THE SHORE FISHES OF PERU 199 



underneath; dorsal and caudal brown; other fins lighter; axil of pec- 

 toral dark brown, this color extending somewhat on inner surface of 

 fin. 



The description is based on the type (U.S.N.M. No. 77654) from 

 Chimbote, the only specimen at hand, which is now 270 mm. (220 

 mm. to base of caudal) long, Evermann and RadcUffe (see reference 

 above) recorded a paratype from Paita, 310 mm. long, which I have 

 not seen. This species has a larger, deeper head, with a steeper and 



Figure 43. — Caulolatilus cahezon Evermann and Radcliffe. From the type, 270 mm. long, 

 Chimbote, Peru (U.S.N.M. No. 77654). (After Evermann and Radcliffe, 1917.) 



more strongly convex dorsal profile than C. princeps. It also has a 

 deeper cheek, and broader preorbital; differences most evident if 

 specimens of about equal size are compared. The scales are rather 

 larger, and ctenoid (instead of smooth) on chest; the number of soft 

 rays in the dorsal and anal are slightly fewer; and the caudal fin is 

 notably less deeply concave. 



Range. — Known only from Chimbote and Paita, Peru. 



CAULOLATILUS PRINCEPS (Jenyns) 



Peje-blanco; Peje-fino 



Latilus princeps Jenyns, 1842, p. 52, pi. 11, Chatham Island, Galdpagos Archi- 

 pelago (original description). 



Caulolatilus princeps Steindachner, 1902, p. 123, Callao, Peru (description). — 

 Starks, 1906, p. 799, Callao, Peru. — Evermann and Radcliffe, 1917, p. 

 110, Lobos de Afuera, Callao, and Pisco, Peru (synonymy; description; 

 range). — Nichols and Murphy, 1922, p. 510, Chincha Island, Pescadores 

 Island, and South Guanape Island, Peru (notes). 



Head 3.45 to 3.8; depth 2.55 to 3.8; D. VIII or IX, 23 to 26; A. II, 

 23 or 24; P. 19; scales 116 to 128; vertebrae 27 (one specimen dissected). 



Body quite elongate, compressed, generally deepest over insertion 

 of ventrals, tapering posteriorly, its greatest thickness usually exceed- 

 ing half its depth; profile anterior to dorsal fin quite convex, rather 

 steep over snout and eyes; caudal peduncle short, compressed, 3.1 to 



