OCR Text |
Show 1868.] DR. A. GUNTHER ON N E W AMERICAN FISHES. 2-13 narrow adipose membrane in front and behind. Origin of the dorsal fin equidistant between the end of the snout and the adipose fin considerably in advance of the ventrals. Pectoral terminating at a considerable distance from the ventral, ventral terminating close to the vent. Abdomen rounded before and behind the ventral!. Scales with their entire margin conspicuously serrated. Coloration uniform. Two examples were collected by Mr. Bartlett in the Huallaga, the longest being 5| inches long. CURIMATUS ASPER. (Fig. 8, p. 242.) This species differs from C. cyprinoides, C. essecjuibensis, and C. schomburgkii in having the scales strongly serrated, from C. rupioides in the form of the snout, and from C. ciliatus in the form of the body. D. 11. A. 12-13. V. 9-10. L. lat. 51. L. transv. i^11. The height of the body is contained twice and two-thirds or thrice in the total length (without caudal), the length of the head thrice and one-half. Upper profile slightly concave above the occiput. Snout as long as the diameter of the eye, which is a little more than one-half of the width of the interorbital space. Snout somewhat projecting beyond the mouth. The second suborbital bone is twice and one-half as long as deep. Eye with an anterior and posterior adipose membrane. Origin of the dorsal fin nearer to the end of the snout than to the root of the caudal, in advance of the ventrals. Pectoral fin extending beyond the base of the ventrals, ventral fins to, or nearly to, the vent. Abdomen flat before the ventrals, compressed behind them. Scales with their entire margin conspicuously serrated. Coloration uniform. Four examples were collected by Mr. Bartlett on the Huallaga and at Xeberos. The largest is 7 inches long. CURIMATUS DOBULA. Allied to C. troschelii. D. 12. A. 10. L. lat. 43. L. transv. 6/7. The height of the body is contained thrice and four-fifths in the total length (without caudal), the length of the head four times. Upper profile slightly convex on the nape. Abdomen rounded in front and behind the ventrals. Snout rather shorter than the eye, the diameter of which is contained thrice and one-third in the length of the head, and less than the width of the interorbital space. Orbit with an adipose eyelid in front and behind. Caudal fin deeply forked, at least as long as the head. The origin of the dorsal fin is nearly midway between the end of the snout and the adipose fin, corresponding to the tenth scale of the lateral line. The pectoral fin terminates at some distance from the ventral; the ventral fin does not reach to the vent. Scales with a few obtuse denticulations. Body silvery; dorsal fin with an indistinct oblique blackish band ascending forwards. |