250 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 

 ANISOTREMUS SCAPULARIS (Tschudi) 



Chita; Sargo; Corcovado 

 Figure 55 



Pristipomus scapulare Tschudi, 1845, p. 12, Huacho, Peru (original descrip- 

 tion) . 



Anisotremus scapularis Abbott, 1899, p. 350, Callao, Peru (synonymy, in part 

 incorrect). — Evermann and Radcliffe, 1917, p. 81, pi. 8, fig. 1, Mollendo, 

 Callao, Ballestas Island, Lobos de Afuera, Lobos de Tierra, and Paita, Peru 

 (references; description; range). — Nichols and Murphy, 1922, p. 509, North 

 Chincha Island and Callao market, Peru. — Fowler, 1940b, p. 772, Peru. 



Head 3.0 to 3.3; depth 2.1 to 2.5; D. XII, 14 to 16 (rarely 17); A. 

 Ill, 12 or 13; P. 16 or 17 (rarely 18); scales 65 to 73; vertebrae 26 

 (two specimens dissected). 



Body deep, compressed, its greatest thickness notably less than 

 half the depth; back high; profile in advance of dorsal fin strongly 



Figure 55. — Anisotremus scapularis (Tschudi). From a specimen 400 mm. long, Mollendo 

 Peru (U.S.N.M. No. 77683). (After Evermann and Radcliffe, 1917.) 



convex; snout blunt, especially in large specimens, 3.25 to 4.2 in head, 

 eye 3.0 (in young) to 5.25 (in adult); interorbital 4.0 (in young) to 

 2.5 (in adult); mouth low, rather small, nearly terminal; lower jaw 

 slightly included; maxillary generally reaching vertical from anterior 

 margin of eye, 3.0 to 4.2 in head; teeth in each jaw in a broad band, 

 the outer ones considerably enlarged, conical or pointed; preopercular 

 margin coarsely serrate at and above its lower posterior angle; gill 

 rakers short, those at angle about as long as pupil, 12 to 14 more or 

 less developed on lower and about 9 to 11 on upper limb of first arch; 

 chin with 3 pores, forming a triangle ; scales ctenoid, reduced anteriorly 

 above lateral line, on head, and on chest, extending more or less on all 

 soft rays of fins, missing on snout and mandible, 11 or 12 complete 

 longitudinal rows between lateral line and origin of dorsal, consistently 

 5 complete rows on caudal peduncle between lateral line and median 

 dorsal row, and 6 rows below lateral line and median ventral row; 



