THE SHORE FISHES OF PERU 103 



whereas it is only about as long as the eye in nasus; and finally speci- 

 mens of nasus of this size have a rather definite dark stripe on the 

 back, which naso lacks. 



Range. — Panama Bay to northern Peru. 



ANCHOA NASUS (Kner and Steindachner) 



Anchoveta 

 Figure 22 



Engraulis nasus Kner and Steindachner, 1866, p. 388, pi. 2, fig. 17, Chincha 

 Island, Peru (original description). 



Engraulis tapirulus Cope, 1877, p. 29, probably Pacasmayo Bay, Peru (original 

 description) . 



Engraulis peruanus Steindachner, 1879a, p. 60, Callao, Peru (original description). 



Stolephorus tapirulus Abbott, 1899, p. 335, "Pacasmayo bay?," Peru (description, 

 based on type material). 



Anchoviella peruana Jordan and Seale, 1926, p. 401 (description, based on speci- 

 mens from Callao, Peru). 



Engraulis nasus Fowler, 1941a, p. 235 (references). 



Anchoviella tapirulus Fowler, 1941a, p. 235 (references). 



Anchoa nasus Hildebrand, 1943a, p. 102, fig. 44, Gulf of Guayaquil, Callao, and 

 Chincha Islands, Peru (synonymy; description; range). 





Figure 22. — Anchoa nasus (Kner and Steindachner). From a specimen 105 mm. long, 

 "Peru" (M.C.Z. No. 17983). (After Hildebrand, 1943.) 



Head 3.3 to 3.9; depth 3.9 to 4.6; D. 15 or 16; A. 21 to 27; P. 13 to 

 15; scales about 36 to 40; vertebrae 41 (2 specimens dissected). 



Body rather slender, somewhat variable in depth, its ventral out- 

 line generally more strongly curved than the dorsal; chest and abdo- 

 men with a blunt edge; head moderately long and low, its depth at 

 joint of mandible generally about equal to its postorbital length and 

 half the eye; snout projecting about three-fourths its length beyond 

 tip of mandible, 5.0 to 5.7 in head; eye 3.7 to 4.6; postorbital part of 

 head 5.5 to 7.5 in length; maxillary rather pointed, extending slightly 

 beyond joint of mandible, 1.2 to 1.3 in head; mandible 1.45 to 1.55; 

 cheek moderately long and narrow, nearly as long as eye and snout 

 in large specimens, notably shorter in young; gill rakers fairly slender, 

 about as long as snout, 24 to 28 on lower and 21 to 25 on upper limb 

 of first arch ; scales mostly lost, with fairly smooth edges, and vertical 



