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Show FISII. 69 Habitat, King George's Sound, New Holland. Cuvier and Valenciennes have noticed several variations of form occurring in different specimens of the C. traclturus, from different seas, which they have not ventured to raise to the rank of species. That the one here described is entitled, however, to this distinction, I can hardly entertain a doubt. The suddenness of the bend in the lateral line, and the more backward point at which the bend commences; the larger number of laminre which protect it; and also the larger number of rays in the second dorsal and anal ; all seem to indicate a specific difference. Whether it be identical with any of the varieties noticed by them is uncertain ; 'but it seems to be distinct from the only one they speak of as having been received from New Holland, in which the number oflaminre did not exceed seventy-three. I have called it declivis, in reference to the character of the lateral line above alluded to. It was obtained by Mr. Darwin in Princess Royal Harbour, in King George's Sound. 2. CARANX TORVUS. Jen. PLATE XV. C. corpore cmssiusculo, subelongato; altitudine vix quartam partem longitudinis requante, capite quartam superante ; maxilla inferiore longiori ; oculis magnis; suborbitalibus venis nonnullis subpm·allelis obscuris notatis; lined laterali parum dtflexd, antice squamis parvis inermibus, postice laminis carinatis 35 vel 36 tectd; spina reclinatd ante pinnam dorsalem sub cute occultd; pectoralibus longis, falcatis, ad initium pinnre analis prope pertingentibus. D. 8-l/2G; A. 2-1/22; C. 17, &c.; P. 21; V. 1/5. LoNG. unc. 11. lin. 9. FoRM.-Thicker and deeper in the body than the C. tmclwrus. The greatest depth a little less than one-fou1·th of the entire length; the thickness exceeding (but by a very little) half the depth. Head large; its length a little more than one-fourth of the entire length; its height or depth, taken in a line forming a tangent to the posterior part of the orbit, less than its own length by two-sevenths. Eyes large; their diameter very nearly one-third the length of the head ; partially covered at the sides by two fatty membranous veils, as in several other speci~s. The ventral line of the body is rather more curved than the dorsal, and the upper profile m like manner a little more approaching to rectilineal than the lower. The lower jaw a little the longer, and ascending to meet the upper. Maxillary reaching not quite to beneath the middle of the eye; its extremity truncated in the form of an arc, with the curvature inwards. In ea.ch jaw a single row of very fine, minute, closely set teeth ; two small patches on the anteriOr extremity of the vomer, a band on each palatine, and one on the tongue, all closely shorn velutine. Suborbital, on each side of the extremity of the snout, marked with se~eral nearly parallel dark-coloured veins. Preopercle with the angle very much rounded ; the hmb broad, |