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Show 160 APPENDI'X. THE following Appendix contains descriptions of a few species, which were omitted to be noticed in their proper places; and further remarks with respect to some, which will be found in the body of the work. FAMILY.-PERCIDlE. 1. APHRITIS UNDULATUS. Jen. PLATE XXIX. fig. 1. A. elongatus: lateribus supm pallide olivaceis, fasciis transversis abbreviatis, lineisque longitudinaliter undantibus, nig1·is; lateribus infra m·genteis: pinnis dorsalibus et caudali punctatis; pinnis, 1·eliquis, et lined laterali, albidis. B. 6; D. 8-25; A. J/22; C. 14, et 6 brevioribus; P. 22; V. l/5. LoNG. unc. 3. lin. 1. FonM.-Elongated; the depth about one-sixth of the entire length; the thickness two-thirds of the depth. Head four-and-a-half times in the length. Profile falling very gradually at first, but more rapidly in advance of the eyes, causing the snout to appear rather obtuse. Mouth small: maxillary slender, hardly reaching to a vertical line from the anterior margin of the orbit: upper jaw slightly longer than the lower, and very protractile. Teeth very minute, forming a narrow velutine band: a patch on the chevron of the vomer scarcely visible, but capable of being very distinctly felt; none apparent on the palatines. Eye one-fourth the length of the head, and distant one diameter from the end of the snout; the interocular space rather less than the diameter. Snout slightly indented, or furrowed out in front of the eyes. A series of impressions on the lower jaw, and along the limb of the preopercle, but much less obvious than in the next species, and not distinctly porous. Preopercle with the ascending margin vertical, the angle at bottom rounded; the limb broad and distinctly marked, with the boundary line between it and the cheek slightly elevated into a ridge. The opercle, with its membrane, produced backwards in an angle, the suboperclc being visible beneath. The branchial membrane six-rayed, and fastened to the isthmus underneath, the aperture commencing beneath the ascending margin of the preopercle. Lateral line commencing at the upper angle of the gill-opening, and following the curvature of the back at one-fourth of the depth, and preserving this direction throughout its course, not 2 |