Helix divisa. Tab. 2 fig. 5. a, b.

Testa obtecte perforata, lenticulari-depressa, orbicularis, carinata, crassiuscula, superne fulva, radiato-striata, minutissime granulata, carina acuta, superne subcrenulata, basi convexa, nitidissima, griseo-albida, radiatim substriata ad umbilicum declivens; spira convexiuscula; anfractus 5, planulati; apertura angulato-lunaris, intus margaritacea; peristoma simplex, basi incrassatum, ad columellam expansiusculum. Diam. maj. 23, min. 20, alt. 11, mill. (Mus. Brit.)

A Helix of the Caracolla section, allied to the C. panayensis of Broderip. Found on the ground at the roots of trees, in the South-East Island of the Louisiade Archipelago.

Helix louisiadensis. Tab. i. fig. 8. a, b.

Testa imperforata, globoso-turbinata, solidiuscula, sub lente rugosa, albida, fasciis variis purpureo-fuscis ornata; spira conoidea, rubescens; anfrac. 5 convexiusculi, ultimus magnus, paululum deflexus; apertura ovata, intus nitide livida, peristoma expansum, reflexum, sordide violaceum, margine externo sinuato, columellari incrassato, dilatato, subsulcato. Diam. maj. 26, min. 21, alt. 20, mill. (Mus. Brit.)

This remarkable snail has a tendency towards a trochi-form contour. The ground colour appears as a white band on the body whorl marking its most prominent portion just below the centre. The sinuation of the outer lip and impression of the whorl behind the peristome, give a slightly ringent aspect to the mouth. It is very distinct from any known species; its affinities are more with Australian than with Philippine forms. It was taken on a tree in the South-East Island of the Louisiade Archipelago.

Helix yulei. Tab. n. fig. 6. a, b.

Testa profunde umbilicata, depresso-globosa, solida, striata, sub epidermide fulvo-alba, fasciis castaneis cingulata; spira sub-depressa, obtusa; anfractus 6 convexiusculi; apertura subcircularis; peristoma nigrum, expansum, margine basali reflexo, columellari dilatato, umbilicum subtegente. Diam. maj. 37, min. 27, alt. 25, mill. (Mus. Brit.)

This handsome species is of a rich fulvous hue, with dark chestnut bands and a deep chestnut umbilicus, partly covered by the reflexion of the nearly black lip. It is allied to the H. incei, a well known north-east Australian species. It was found in hollow trees, and under logs and stones at Port Molle, in the same region.

Helix macgillivrayi. Tab. 3 fig. 1.

Testa imperforata, trochiformis, carinata, striis minutis spiralibus ornata, pallide fusco-carnea, punctis nigris albo-occellatis sparsa; spira conica; anfractus 6 planati, ultimus carinatus, basi subplanatus; apertura oblique oblonga, intus brunnea, margine externo bisinuato; peristoma album, incrassatum, infra reflexum; columella basi rufescens. Diam. maj. 23, min. 19, alt. 21, mill. (Mus. Brit. and Geol.)

Of all Australian Helices, this is perhaps the most curious. Its outline and aspect are singularly like those of a Trochus of the Ziziphinus group. The colour is also very singular, being a yellowish flesh hue deepening on the base to rich brownish-yellow, and speckled irregularly with minute black dots which are areolated with white, the white ring being largest on the side towards the mouth. The fine striae that encircle the body are also very curious. The outer lip of the aperture seems as if it had been dented in two places. Behind the white thickened peristome, intemaily is a dark brown band, which is seen through the shell as a dark blackish green stripe. The edge of the outer lip declines to join the body whorl a little below the keel. It was found on trunks and branches of trees in the Frankland Isles.

Helix dunkiensis. Tab. 2 fig. 7. a, b.

Testa umbilicata, depresso-globosa, subcarinata, solida, radiato striata et subtilissime granulata, flavida; spira late depressa, convexiuscula, apice obtusa; anfractus 6 convexiusculi, ultimo obsolete carinato; apertura lunaris, intus alba; peristoma superne rectum, margine basali margine columellarique sub-reflexis, umbilicus profundus, conspicuus, vix obtectus. Diam. maj. 24, min. 21, alt. 16, mill. (Mus. Brit.)

This snail strikingly resembles some Illyrian forms. It has affinities with H. coriaria, a species said to be from Ceylon. It was taken under stones and about roots of trees in Dunk Island, on the North-East coast of Australia.

Helix franklandiensis. Tab. 2 fig. 2. a, b.

Testa aperte-umbilicata, tumido-depressa, nitidissima, superne radiatim striata, cornea, fasciis angustis transversis distantibus fulvis; spira angusta; anfractus 5 planiusculi, ultimus rotundatus, antice vix descendentes; apertura rotundata; peristoma simplex, vix acutum, rectum, margine columellari non reflexo. Diam. maj. 26, min. 21, alt. 14 mill. (Mus. Brit.)

This beautiful snail is of a brightly shining yellowish or greenish horn colour. The whorls of its spire are small, but the body whorl, whilst preserving a wide diameter throughout, gradually increases in trumpet-like manner to the round mouth. It belongs to the same group with H. olivetorum and H. nitida, and is allied to the Australian H. ptycomphala. It occurs about the roots of trees in the Frankland and Lizard Islands.

Helix iuloidea. Tab. 2 fig. 4. a, b, c, d.

Testa late et perspective umbilicata, orbicularis, superne depressa seu subconcava, rufo-cornea, regulariter costulata; anfractus 4 1/2 convexiusculi, ultimus tumidus, rotundatus; apertura lunaris; peristoma simplex, acutum. Diam. maj. 4 1/2, min. 4, alt. 3 mill. (Mus. Brit. & Geol.)

This curious little snail, resembling a rolled-up Iulus, and reminding us of our own H. rotundata and its allies, was found under a stone at Port Molle.

Helix inconspicua. Tab. 2 fig. 3. a, b, c.

Testa perforata, depresso-convexa, laevigata, nitidiuscula, pallide cornea, basi subcompressa; anfractus 6, planiusculi; spira obtusa; apertura lunaris; peristoma rectum, simplex, margine columellari reflexo: umbilicus minutus, subobtectus. Diam. maj. 8—min. 7—alt. 5 mill. (Mus. Brit.)

A very inconspicuous ordinary-looking little shell, its upper surface recalling the aspect of H. alliaria but with more convexity and no lustre, and its base that of H. crystallina. It was found, apparently gregarious, under dead leaves in an islet in Trinity Bay.

Balea australis. Tab. 2 fig. 9. a, b.

Testa dextrorsa, rimata, subcylindracea, turrita, decollata, dense capillaceo-costulata, corneo-lutea, maculis obscuris flavidis; sutura impressa; anfractus 11, convexiusculi; apertura pyriformis, columella triplicata, plica inferior maxima, conspicua, elevata, acuta, spiralis; peristoma continuum, solutum. Long. 18—Diam. 4—Apert 4 mill. (Mus. Brit. & Geol.)

This very remarkable shell, the first of its genus discovered in Australia, differs from all its congeners. It has exactly the aspect of a Clausilia, but the mouth is not furnished with a clausium. It was found under stones at Port Molle.

Pupina grandis. Tab. 2 fig. 10. a, b, c, d.

Testa ovato-subcylindrica, superne laevigata, inferne rugulosa, sordide-rufa; spira obtusa; anfractus 6, secundus tumidus, obliquus, ultimus super aperturam planatus; apertura rotundata; peristoma laete aurantiacum, rimatum, crassum, dorsaliter canaliculatum, infra columellari, profunde sinuatum et in canali contorto excavatum; canalis alter minutus ad partem superiorem et externam aperturae; callus columellaris expansus, appressus. Long. 30, Diam. 15, Apert. 7 mill. (Mus. Brit. & Geol.).

This, the giant of its genus, is perhaps the most remarkable land-shell discovered during the voyage. It differs from all other Pupinae in having an unpolished surface. It was found in the South-East Island of the Louisiade Archipelago, under dead leaves chiefly about the roots of trees.

Pupina thomsoni. Tab. 3 fig. 2. a, b.

Testa ovata, polita, nitidissima, translucens, hyalina, solidiuscula; spira obtusa; anfractus 5, duo ultimi majores; apertura orbicularis; peristoma album, crassum, solutum, canalibus duobus interruptum; canalis superior ad partem superiorem et externam aperturae, inferior major, basalis, marginibus disjunctis et in dorsum anfractus prolongatis. Long. 7 1/2, diam. 4 1/2, apert. 2 mill. (Mus. Brit.)

This remarkable and beautiful little Pupina is most nearly allied to the P. bilinguis of Cape York. From that species (which is larger) it differs, however, very materially, most especially in the position of the inferior or basal canal of the aperture which is here placed like the canal of a whelk, but in P. bilinguis is very small and placed high up, cutting as it were the columella. The curious manner in which the margins of the canals are prolonged on the back of the body whorl like parallel and somewhat diverging walls is also a singular feature of this species, which is dedicated to Dr. Thomson, surgeon of the Rattlesnake, and an excellent botanist. It was found among dead leaves at the roots of trees in Fitzroy Island.

Helicina stanleyi. Tab. 3 fig. 4. a, b.

Testa lenticularis, superne inferneque convexa, orbicularis, acute carinata, fusco-carnea, spiraliter striata; spira obtusa; anfractus 4 1/2 leviter convexiusculi; basis imperforata, centraliter laevigata, alba; apertura oblique sublunata, angulata; peristoma simplex, tenue. Diam. maj. 6 1/2, min. 6, alt. 5 mill. (Mus. Brit.)

Found on the leaves and trunks of trees and bushes (especially Scaevola koenigii) in the Duchateau Isles, Louisiade Archipelago. Dedicated to the late Captain Owen Stanley, R.N.

Helicina louisiadensis. Tab. 3 fig. 5. a, b.

Testa depresso-globosa, superne inferneque convexa, orbicularis, obsolete sub-angulata, pallide aurantiaca, sub lente spiraliter striata; spira obtusa; anfractus 4 1/2, vix convexiusculi; basis imperforata, centraliter sub-impressa; apertura lunata, inferne subangulata; peristoma incrassatum, aurantiacum, reflexum. Diam. maj. 4 1/2, min. 4, alt. 3 mill. (Mus. Brit.)

On Round Island in Coral Haven, Louisiade Archipelago, under stones. This pretty little Helicina is nearly allied to some Philippine species.

Helicina gouldiana. Tab. 3 fig. 3. a, b.

Testa depresso-globosa, superne sub-conica, orbicularis, obsolete subangulata, flava seu rufa, spiraliter striata; spira prominens; anfractus 5, planati; basis imperforata; apertura sub-lunata, inferne angulata; peristoma incrassatum, subreflexum, album. Diam. maj. 6, min. 5 1/4, alt. 4 1/2 mill. (Mus. Brit.)

Under the bark of Mimusops kaukii, in the Two Isles, on the North-East coast of Australia. Dedicated to the indefatigable illustrator of Australian ornithology.

Ranella pulchella. Tab. 3 fig. 6. a, b.

Testa turrita, utroque alata, acute-caudata, alba; anfractus tumidi, spiraliter striati, longitudinaliter noduloso-costati, costis crebris, lateraliter varicosi, varices compressi, aliformes, crenulati, striati, ad margines crenati; apertura ovato-rotunda, inferne longe-caudata; peristoma solutum. Long. 20, diam. 14, apert. 4 mill. (Mus. Brit.)

This beautiful shell was dredged in from 8 to 11 fathoms water, on a bottom of sand and shells between Cumberland Island 1.i, and Point Slade (Latitude 21 degrees South Longitude 149 degrees 20 minutes East).

The spiral striae that cross its whorls are grouped in pairs; their interstices are raised, and more or less finely crenulated; as they pass out on the expanded and wing-like varices they diverge, and the lobe-like projections that scallop the margins of the wings are separated from each other by each pair of diverging striae. The fine ribs that cross the whorls are not present on the wings, nor on the back; they are nodulated at their decussation with the raised striae. The wing-like varices of the whorls overlap each other alternately on each side of the shell. The only species to which it has affinity is the R. pulchra.

Scalaria jukesiana. Tab. 3 fig. 7.

Testa lanceolato-turrita, gracilis, alba, laevis, nitida, longitudinaliter costata, costis lamellosis, reflexis, simplicibus, nnmerosis (in ult. anfrac. 20); anfractus 11, tumidi; sutura profunde impressa; varices nulli; apertura orbicularis, margine laevi. Long. 13, Diam. max. 14, apert 3 mill. (Mus. Brit.)

This beautiful little Scalaria is deserving of particular notice on account of the analogy and representation which it exhibits with the S. clathratulus of the seas of the Northern Hemisphere. It is dedicated to the author of the Voyage of the Fly.

New Genus—MACGILLIVRAYIA, Forbes.

Shell spiral, dextral, globular, thin, corneous, transparent (in the only known species smooth or marked by obscure lines of growth) imperforate; spire not produced (with a sinistral nucleus ?). Aperture oblong, entire, angulated below; peristome incomplete, thin, even-edged.

Operculum semicircular, horny, thin, composed of concentric layers with faint traces of a spiral structure at the centro-lateral nucleus, which is on the columellar side; from it there runs a strait rib or process continued nearly to the outer margin, and indicated externally by a depression or groove.

Animal ample, provided with four very long and rather broad linear rugose (or ciliated ?) tentacula; mantle produced into a long siphon; foot very large, expanded, truncate in front, bearing the operculum near its posterior extremity, but not accompanied by filamentous processes or lobes. A float. (Mus. Brit. and Geol.)

This very remarkable mollusk was taken in the towing net off Cape Byron, on the east coast of Australia, in latitude 28 degrees 40 minutes South, fifteen miles from the shore. It was floating and was apparently gregarious. Mr. Macgillivray states that it is furnished with a float in the manner of Ianthina. The largest specimens measure rather less than two lines in diameter. The shell is of a yellow horn colour (as is also the operculum) thin and transparent. It bears a striking resemblance to our much more minute Jeffreysia opalina. The four tentacula and the form of the very peculiar operculum also seem to indicate considerable affinity with the genus Jeffreysia of Alder, and an examination of the remains of the tongue extracted from a dried specimen showed an arrangement and form of the lingual denticles very closely resembling that exhibited by Jeffreysia. On the other hand, the very distinct and long siphonal tube delineated in Mr. Macgillivray's drawing, taken when the animal was alive, would seem to refer this genus to some family probably near to Cancellaridae. It is certainly entirely distinct in every respect from any known Gasteropod. It is a form of very great interest to the geologist, for in it we see the nearest representation of certain palaeozoic (especially Lower Silurian) univalves hitherto referred to Littorina, but which, judging from their associates and the indications afforded by the strata in which they are found, were assuredly either inhabitants of deep water or floaters in a great ocean like the Pacific.

I have dedicated this most interesting creature to my friend Mr. Macgillivray, its discoverer, whose researches have been productive of so much new and valuable contributions to all departments of zoological science.

I have named the species M. pelagica. Tab. 3 fig. 8. a, b, c, d. (Mus. Brit. and Geol.)

New Genus—CHELETROPIS, Forbes.

Shell spiral, turbinate, dextral, imperforate, spirally ridged or double-keeled and transversely wrinkled; spire prominent, its nucleus sinistral; aperture ovate, canaliculated below, its outer margin furnished with two claw-like lobes, the one central and formed by a prolongation of the margin between the keels of the body whorl, the other smaUer and nearer the canal; peristome thickened, reflexed, forming a conspicuous margin.

Operculum none ?

Animal unknown, but certainly floating, and probably pteropodous. This I infer from its habits, and from the analogy of the shell with Spirialis. (Mus. Brit. & Geol.)

The only known species, C. huxleyi (dedicated to Mr. Huxley, Assistant Surgeon of the Rattlesnake, and now eminent for the admirable anatomical researches among marine invertebrata which he conducted during the voyage) is very minute, being not more than the 1/24th of an inch in diameter. It is translucent and of a brownish-white hue. Its aspect is that of a Turbo in miniature. The whorls are tumid, the spire prominent; the body whorl is belted by two prominent keels, one of which is continued on the whorls of the spire: between, above, and below these keels are transverse membranous raised ridges, which in the central division of the body whorl are curved forwards. This curvature corresponds with the projection of the curious incurved claw-like lobe that proceeds from thc central portion of the lower lip. Towards the base of the aperture is a second and similar but smaller lobe, below which is the short but broad and well-marked canal. The entire lip is marginated by the thickened and reflected peristome. I believe this curious floating shell will throw some light on the true nature and habits of several palaeozoic types. It was taken in the towing net, gregarious, in the sea off Cape Howe, the south-east corner of Australia. Tab. 3 fig. 9. a, b.

CONTENTS OF PLATES OF NEW SHELLS.

Tab. 2.

Fig. 1. Helix brumeriensis. Fig. 2. Helix franklandiensis. Fig. 3. Helix inconspicua. Fig. 4. Helix iuloides. Fig. 5. Helix divisa. Fig. 6. Helix yulei. Fig. 7. Helix dunkiensis. Fig. 8. Helix louisiadensis. Fig. 9. Balea australis. Fig. 10. Pupina grandis.

Tab. 3.

Fig. 1. Helix macgillivrayi. Fig. 2. Pupina Thomsoni. Fig. 3. Helicina gouldiana. Fig. 4. Helicina stanleyi. Fig. 5. Helicina louisiadensis. Fig. 6. Ranella pulchra. Fig. 7. Scalaria jukesiana. Fig. 8. Macgillivrayia pelagica. Fig. 9. Cheletropis huxleyi.

...

APPENDIX 6.

DESCRIPTIONS OF SOME NEW SPECIES OF ANNULOSA COLLECTED BY MR. MACGILLIVRAY DURING THE VOYAGE OF H.M.S. RATTLESNAKE, BY ADAM WHITE, ESQUIRE, F.L.S., ASSISTANT ZOOLOGICAL DEPARTMENT, BRITISH MUSEUM.

Among the very numerous Insects and Crustacea, collected by Mr. Macgillivray during the voyage of the Rattlesnake, the following have been selected for illustration; references to and descriptions of some of the Diptera, Homoptera, and Hemiptera, collected by him, have appeared in the Catalogues of the British Museum drawn up hy Messrs. Walker and Dallas, while the names and descriptions of others will appear in catalogues in preparation. A fine species of the class Crustacea, discovered by him, has been described and figured in the Illustrated Proceedings of the Zoological Society. (Cancer [Galene] dorsalis, White.)

INSECTS. COLEOPTERA.

Chrysodema pistor, Laporte and Gory. Buprestidae, t. 6, f. 33.

Habitat: Australia (Cape Upstart). Mr. Macgillivray informs me, that the specimens of this species were observed by him coming out of a dead tree (Casuarina).

Pachyrhynchus stanleyanus.* Tab. 4 fig. 1, 2.

(*Footnote. In memoriam Owen Stanley, in classe Britannica Navarchi, species haec distincta et peculiaris nominatur.)

Pachyrhynchus nigerrimus, maculis parvis squamosis plurimis viridiscenti-albidis.

Habitat: Pariwara Islands, New Guinea. Four specimens.

Head between the eyes somewhat rugose, some of the rugose punctures with pale greenish white scales; an abbreviated longitudinal impressed line down the front. Beak short and thick (somewhat as in Pachyrhynchus cumingii, Waterhouse). Thorax irregularly and somewhat coarsely punctured, the sides somewhat wrinkled in front, the punctures scaled, a triangular depression on the posterior part of thorax, the bottom is covered with scales, at least in some specimens, and there are three spots similarly scaled and placed somewhat transversely: the Elytra with eight to ten punctured lines, running somewhat irregularly, especially towards the sides, each elytra with ten, twelve, or more spots of scales, arranged longitudinally in spots on the sides, and largest towards the end. Underside of the mesothorax and metathorax with many greenish scales. Legs thick, polished, and with scattered grey hairs proceeding from the punctures.

I have named this somewhat mourning Pachyrhynchus after Captain Owen Stanley and his father, the late venerable Bishop of Norwich and President of the Linnean Society. Both of these gentlemen were fond of natural history, especially the father, who was a good observer of the habits of birds. The son, Captain Owen Stanley, was an accurate, though not very practised draughtsman; and I recollect with pleasure his pointing out to me, at one of the soirees at Brook Street, a volume of sketches (coloured) made by him on one of his voyages, in which objects of natural history were ably introduced. He encouraged natural history researches.

HYMENOPTERA.

Trigonalys compressus. Smith. Trans. Ent. Soc. Lond. n. ser. 1. p. —— pl. 16. f. 2.

Sphex compressa. De Geer. Mem. 3.

Trigonalys bipustulatus. Smith (olim) Ann. and Mag. Nat. Hist. 7 1851.

Habitat: Nest of Polistes lanio. Brazil.

Among the Hymenoptera, few genera have created greater dispute than the anomalous genus Trigonalys of Westwood. Mr. Macgillivray one day brought to the British Museum the nest of a Brazilian Polistes. My friend, Mr. Frederick Smith, is well known for his profound knowledge of the Hymenoptera, Exotic and British, which, though he has studied them ONLY fourteen years, are better known to him, perhaps, than to any other living Entomologist; the instant that he looked at the nest, he exclaimed, "Why, here is Trigonalys!" and certainly a large, black-headed creature, not very like Polistes, protruded from one of the cells. Mr. Smith, on the 7th April, 1851, communicated this piece of information to the Entomological Society of London, and in their Transactions his brief memoir was lately printed. I cannot do better than give it in Mr. Smith's own words. Mr. Smith, subsequently to the reading of the paper, ascertained that the species had been described in the great work of De Geer, a book of which it would be well to have a condensed new edition. Mr. Smith says:

"John Macgillivray, Esquire, Naturalist to Her Majesty's Ship Rattlesnake, lately presented to the British Museum the nest of a South American species of Polistes, which he says is very abundant at St. Salvador, where even in the streets it attaches its nest under the eaves of houses; the species is the Polistes lanio of Fabricius, and in all probability the Vespa canadensis of Linnaeus; a specimen of the species is preserved in the Banksian Cabinet. On examining the nest, I found it consisted as usual of a single comb of cells, having in the centre at the back a short footstalk, by which the nests are attached in their position; the comb contained sixty-five cells, the outer ones being in an unfinished state, whilst twenty-two of the central ones had remains of exuviae in them, and one or two closed cells contained perfect insects ready to emerge; about half a dozen of the wasps had the anterior portion of their bodies buried in the cells, in the manner in which these insects are said to repose. In one cell I observed the head of an insect evidently of a different species, it being black and shining. On extricating it, I discovered it to be a species of Trigonalys; I subsequently carefully expanded the insect, and it proved to be the Trigonalys bipustulatus, described by myself in the Ann. and Mag. of Natural History, volume 7 2nd Series, 1851, from a specimen captured at Para by Mr. Bates, now in the possession of William Wilson Saunders, Esquire. The insect was not enveloped in any pellicle, nor had the cell been closed in any way; the wings were crumpled up at its side, as is usual in Hymenopterous insects which have not expanded them, proving satisfactorily that it had never quitted the cell, and that Trigonalys is the parasite of Polistes.

"This discovery is one of much interest, proving the relationship of the insect to be amongst the pupivora, to which family it had been previously assigned by Mr. Westwood, see Volume 3 Ent. Transactions page 270. The specimen is seven lines in length, entirely black, the head shining, the thorax and abdomen opaque, and having two white maculae touching the apical margin of the basal segment above; the wings are smoky, the antennae broken off. Of one of them I found subsequently seventeen joints—the perfect insect in the possession of Mr. Saunders having twenty joints."

LEPIDOPTERA.

Drusilla myloecha, Tab. 4 fig. 3, 4.

This fine butterfly* was found flying in considerable plenty in the woods of one of the islands of the Louisiade Archipelago; it forms a very interesting addition to a genus, of which but few species are known, and is allied to the Drusilla catops of Dr. Boisduval, described and figured in the Voyage de l'Astrolabe. The upper sides of the wings of the Drusilla myloecha are of pure white with a silky lustre, the front edge of the fore wings margined with deep brown both above and below; in the male there is a slender white line on the upper side running close to the edge, and extending beyond the middle of it; the two discoidal veins in the male are brown on the upper side, and the edge of the upper side of the lower wings is brown. The under side of the lower wings has a dark brown band at the base, widest close to the attachment of the wing and narrowing to a large ocellus which it surrounds in the form of a narrow brown ring; the black ocellus has a very small white pupil with a slight bluish crescent on the inside, and is surrounded by a fulvous ring; thcre is a second black ocellus nearer the hind edge than the middle, with a small white pupil and a wideish fulvous ring, separated from the white of the wing by a narrow brown ring; head, antennae, legs, and thorax in front brown; palpi fulvous.

The figures are of the size of nature, and carefully drawn by Mr. Wing.

(*Footnote. Described (but not figured) by Mr. Westwood, in the Transactions of the Entomological Society of London, New Series, Volume 1 page 175 1851, from Mr. M.'s specimens in the British Museum. Mr. W. felt anxious to describe this striking Drusilla.)

Eusemia mariana, Tab. 4 fig. 5.

E. alis coerulescenti-nigris; anticis albo-fasciatis et maculatis, posticis croceo-maculatis.*

(*Footnote. Filiae meae "Marian Frances White," speciem hanc pulchram d.d. descriptor.)

Upper wings black, with a slight bluish tinge; a wide band extends across the wing before the middle; it is white with a slight yellowish tint, at the lower edge of the wing it is abruptly narrowed; behind the middle of the wing, and between it and the tip, are from five to six pale yellowish white spots, the four or five outermost the smallest, and one or two of them sometimes obsolete; between the base and the band a narrow bluish grey line extends across the wing, and behind the band, at an equal distance, there is another short, waved, bluish grey line running down to the inner margin. The margins of the band and spots are bluish grey. The lower wing is narrowly black at the base, with a transverse band of a king's yellow colour; this is the widest on the inner edge, near its outer end there is an angular black spot; the apical half of the wing is black, with numerous king's yellow spots arranged in two lines, two spots about the middle connected and notched with black. Head, thorax, and base of abdomen black, rest of abdomen of a king's yellow colour.

Mr. Macgillivray took two specimens of this fine species. One flew on board when the ship was to the north of Cape Weymouth; the other was taken at Cape York: the figure is of the natural size.

Cocytia durvillii, Boisd. Monog. des Zygenides, t. 1, fig. 1.

This is an abundant species in the Louisiade Archipelago, flying on shore in the daytime among trees (as D'Urville remarked it did in New Guinea); and it frequently came on board the Rattlesnake, even when distant from the shore two or three miles. It flies heavily like a moth, and is easily caught. This beautiful insect is one of the finest found by Mr. Macgillivray. Only three specimens are recorded: those discovered by Admiral d'Urville, and described by Dr. Boisduval; Mr. M. brought home two, deposited with the rest of his collection in the British Museum.

CRUSTACEA. MALACOSTRACA: DECAPODA.

Ommatocarcinus macgillivrayi. Tab. 5 fig. 1.

Carapace more than twice as wide as long; the sides in front extended into a long slightly bent spine. The frontal portion between the pedicles of the eyes is narrow, much as in Macrophthalmus, it slopes down towards the mouth, and is deeply notched at the sides for the reception of the eyes; the fore-edge is doubly notched in the middle, there being a slight tooth between the emarginations. The epistome not so prominent as the lower margin of the orbit; the inner antennae, with the basal joint, long (the others broken off). The eye-pedicles very long and cylindrical, thickest at the base, slightly bent, somewhat thickened towards the end, so long, that, when bent back, the eye extends a little beyond the end of the spine. Mouth formed nearly as in Gonoplax, the third joint of the jaw-feet wider than long. Abdomen seven-jointed, the first joint scarcely visible, shaped much as in Gonoplax, but rather wider, the base of the terminal joint longer than the sides. Anterior legs two and a half times as long as the Carapace, measuring it from spine to spine, the arm long and triangular, the upper portion more or less thickly covered with small papillae, and having a nearly obliterated spine about the middle; the wrist smooth, roundish, with a large blunt tooth on the inside; hands somewhat flattened, widest at the base of the claws, with a broad ridge on the inside, the edge of it rough with small papillae; the upper edge of hand rough with small papillae; the claws lap over each other at the tips, and are irregularly toothed on the inside; the fixed claw of the right hand bent at the base, so as to leave a considerable space when the other is closed upon it; upper part of arm, hand, and movable claw pretty thickly spotted with red, epistome orbits and greater part of the upper surface of carapace spotted with red, sides and hind part of carapace white; upper edge of the orbit covered with small papillae; a tolerably prominent ridge extends across the carapace before the middle. Four hind pairs of legs long, slender, compressed, the upper edges of the second and third pairs fringed with hairs, as well as the lower edge of the two terminal joints, the claws long, thin, and somewhat bent.

Habitat: Port Curtis. Shoal water, mudbanks.

This fine Crustacean is allied to Gonoplax and Curtonotus; and being one of the most prominent species sent home by Mr. Macgillivray, is selected for description here; the figure is of the size of nature.

Porcellanella triloba. Tab. 5 fig. 2.

Carapace somewhat flattened, the front produced into three large teeth or lobes; the intermediate the widest and most prominent; the sides of the outer lobes rounded before the eye; carapace longer than wide, widest a little behind the insertion of the antennae, the upper surface smooth, polished, with some transverse scratched lines, which are slight and irregular, they are most observable in front and on the sides, behind it is somewhat notched in the middle. External antennae long, longer than twice the breadth of the carapace, inserted in a sinus behind the eye, the basal portion formed of three joints, the first projecting beyond the sides of the carapace, the second wider and longer than the first, third short and thick at the end; the terminal part of antennae long, thread-like, and formed of very numerous articulations; the eyes large, and with a short pedicel. Anterior legs long and smooth, the pincers overlapping each other at the end, their inner edge rough, scarcely toothed; from before the base of the inside of the movable claw a thickish line of hairs extends about halfway down the hands, which bulge, and are rounded on the inside, but on the outside are straightish or slightly waved, and rather sharply keeled; the second, third, and fourth pairs of legs are somewhat compressed, and terminate in claws with four longish hooks on the inside; posterior pair of legs folded over the back, narrow, with the second joint somewhat bent upwards.

This curious species was dredged by Mr. Macgillivray off Cape Capricorn, in latitude 23 degrees 25 minutes South longitude 151 degrees 12 minutes East in 15 fathoms, the bottom being muddy sand and shells. It is allied to the species of the second section of the genus Porcellana, as detailed by Professor Milne Edwards in the second volume of the Histoire Naturelle des Crustaces, but has characters sufficient to constitute a new subgenus, to which may be applied the name Porcellanella. The figure represents it of twice its natural size.

P.S. The figures have been carefully drawn from the originals by Mr. William Wing, so well known as a Zoological Draughtsman, and will at once explain my imperfect descriptions.

THE END.