Volume I Part 43 (1/2)

RADII BR 6; D 3 : 23; A 3 : 12; C 21; P 18: V 1, 5

FISHES PLATE 2 Figures 1, 2, 3, 4, and 5

This fish is as thin in the body as a lath, whence the generic nareatest width is at the cheek, as shown by the section figure 3, where the transverse diaure 4 shows the section at the gill cover, and third dorsal spine, where the thickness is less; and figure 5, represents a section behind the ventrals, where the thickness is little radually decreases to the caudal fin The oblong profile is highest at the third dorsal spine, whence it descends with a slightly convex curve to thenearly on a line with the belly The height of the tail between the vertical fins is equal to half the greatest height of the body The dorsal and ventral lines are both acute, especially the former, and the medial line of the nape continues acute to the orbits

The length of the head, measured from the upper jaw, is contained four tie round eye, situated near the upper profile, fills th The orbit is surrounded by a ring of muciferous canals, with open orifices, which are the only exterior vestiges of the suborbitar chain

The small mouth descends obliquely and scarcely reaches back to the orbit The intermaxillaries are moderately protractile, but the lower jahen depressed, projects still further forward The maxillary widens towards its lower end, which curves a little forwards Three pores exist on each limb of the lower jaw

The teeth of the upper jaw present a fine, but rather uneven and broad cardiforle roards the corner of the er and more subulate Four canine teeth stand across the end of the jaw anterior to the dental plate, the inter shorter than the outer ones The dentition of the under jaw differs in the dental band being narrower, and in there being a conspicuous canine in the middle of each li across the extreme tips of the jaw, opposed to the upper ones Most of the teeth are slightly curved backwards The chevron of the vomer projects from the roof of the mouth, and its surface is armed by minute teeth in about three or four densely crowded rows The palatine teeth are still more minute, and the band is four or five deep The teeth, when examined with a lens, appear to be very acute and in nowise spherical The pharyngeal teeth are subulate and acute, and of unequal heights There seeeal bone below; but without dissection this could not be clearly

The narrow, slightly pitted, scaleless disk of the preoperculum bounds the scaly cheek behind and below, and has an entire edge with neither spine nor acute angle at the bend The other pieces of the gill cover are closely covered with scales, only a little smaller than those of the body The pretty wide thin inter-operculuill membranes, and covers them when shut up The sub-operculue, and has a small sub-membranous tip, which projects a little beyond the three opercular teeth A small curved notch marks the separation between the interoperculum and sub-operculum

The scales extend on the crown of the head to the middle of the orbits

The snout, lips, jaws, the place at the corner of the ill ularly disposed, showing rhoes The lateral line ascends at its commencement and bends rather suddenly under the first soft dorsal ray to run near and parallel to the ridge of the back It terminates beneath the sixth ray from the end of the fin, but recommences on the fourth scale beneath, and runs in the ht of the tail to the base of the caudal Two or three of the scales before its recommencement, have a minute pit in the middle of their disks, as is not unusual with the Glyphisodons The first part of the lateral line forht scales of the second row from the summit of the back; the posterior part traverses six or seven scales There are twelve or thirteen scales in a vertical row on the side of the body

The anus, situated a short way before the anal fin, has a very small aperture

There are no scales on the fin raduated, ent The twenty-three soft rays are all distinctly articulated, and more or less branched The last ray is divided to the base, and is graduated with the two preceding ones, giving a rounded form to the posterior tip of the fin The specimen had the anterior part of the fin frayed a little, so that it is probable that the soft rays are higher and less distinctly branched than the artist has represented the the example placed before hiill cover and first soft dorsal ray, and from the extreme narrowness of the pelvis are close to each other They are tapering, pointed, and overlap the beginning of the anal, which, though it have fewer rays than the dorsal, is similar in structure The pectoral and caudal are reater space between the anal and caudal than between the dorsal and the sa two very short ones above, and the saeneral colour of the speci yellowish-broith several round dots of azure-blue scattered over the body The cheek is crossed obliquely by a row of three spots

The figure errs in representing the spots as dispersed over the cheek; they are in fact ranged in a row Length, 2 1/2 inches

HABITAT Coast of Australia

Haslar Hospital, 28th October, 1845

APPENDIX

DESCRIPTIONS OF SOME NEW AUSTRALIAN REPTILES

BY JOHN EDWARD GRAY, ESQUIRE, FRS, ETC

Faular, raised in front, head-shi+elds flat, thin, rather rugose Nasal shi+elds ovate, triangular, rather anterior, with a groove behind the nostril Rostral shi+elds triangular, erect Supranasal none; internasal broad; frontonasal large, contiguous; frontal and interparietal small, frontoparietal and parietal moderate; eyebrow shi+elds, 4-4 Temples scaly, no shi+elds between the orbit and labial plates Eyes rather s, with a large scale in front Body fusifore-shaped, keeled; keels ending in a dagger point; largest on the hinder parts of the throat and belly; transverse, ovate, 6-sided Liate, co, depressed; with rings of large, broad, lozenge-shaped, dagger-pointed, spinose scales, with a central series of very broad 6-sided senus is interernia, but quite distinct fro slender elongated toes like Egernia, in the scales being keeled, and in there being no series of large plates beneath the orbit, and it is easily known fro depressed and broad, instead of conical and round Like all the genera above named, it appears to be peculiar to Australia

The Silubosaure Silubosaurus stokesii

REPTILES PLATE 1

Olive brown, varied with black and large white spots; shi+elds of the head white, black-edged