NO. 1468. FISHES FROM ECUADOR AND FERU—^TARKH. ' 795 



3i to 3i; snout, -i; maxillary, 2^. Dorsal, X, T, 24 to X, I, 21; anal, 

 II, 1-0. Scales, Q(5; countino- subvertical series then; are lO scales 

 f I'oni front of dorsal to lateral line, and lo from front of anal to lateral 

 line. 



Anterior profile gently curved a short di.stance in front of dor.sal, 

 thence appearing perfectly straight to near tip of snout, where it agaiii 

 slightly curves downward. Head very broad, with a broad evenly 

 curved interorbital space, 3 to ^U times the diameter of eye. Jaws 

 nearly even in small specimen; the lower included in the large one. 

 Small teeth in 2 or 3 irregular rows in upper jaw, with an outer series 

 of nuich enlarged ones; the length of the latter e([ual to diameter of 

 anterior ncstril. A row of similar enlarged teeth on lower jaw, and 

 an irregular row of smaller teeth outside of them, fitting close against 

 them. No canines present. Maxillary reaching to a little past ante- 

 rior border of eye. Anterior nostril small and round; the posterior 3 

 times as long as wide. Gill rakers 3 or 4 + 10; the longest three- 

 fouilhs diameter of eye. Edge of preopercle with rather sharp 

 <lenticles somewhat enlarged toward angle. 



Pectoral short; equal in length to ventral; 2i in head. Third, 

 fourth, and fifth dorsal spin(\s highest, equal to combined length of 

 snout and eye; tip of third reaching to base of eighth when fin is 

 depressed. The membrane of the next to the last spine scarcel}^ 

 reaches to the base of the last spine, which is a trifle longer than the 

 former, and is attached by a membrane to the soft rays. Base of soft 

 dorsal seven-eighths length of head; its highest rays equal to snout 

 and half eye. Anal spines rather weak, but not flexible; the second 

 spine half the length of the first ray, which is scarcely so long as the 

 second ray; tip of longest ray reaching to tip of last ra}^ when fin is 

 depressed, or to under base of last dorsal ray. Caudal lunate, the mid- 

 dle rays 2 in head, the upper rays li in the smaller specimen. In the 

 larger specimen the caudal is much more deeply lunate, the upper lobe 

 longer and sharper than the lower; extending li times diameter of 

 eye past middle rays. Scales ctenoid; the entire head, except the tip 

 of mandible^ and lips covered with irregular scales. Dorsal and anal 

 fins naked except a narrow definite area at extreme base. Pectoral 

 with a few scales on base. Caudal with small scales on membrane 

 extending considera])ly over half the distance from base to tips of rays; 

 a series of small scales carrying lateral line to edge of caudal. 



Color dusky on top of head and back, becoming silvery below. 

 Dark lines follow the rows of scales on back and sides. These are 

 scarcely noticeable on the smaller specimen, and not very conspicuous 

 on the larger. Dorsals dusky; caudal and pectoi-al slightly dusky; 

 anal with a very little dusky color on mcmbra(i(>; ven(rals white; 

 inside of opercle dnsky. 



