THE SHORE FISHES OF PERU 101 



Color pale; side with silvery stripe, generally rather narrower than 

 eye; side of head silvery; back with few dark dots at least behind 

 dorsal fin; these also present along base of anal and in a median row 

 behind anal; caudal fin with dark points, the tips dusky; other fins 

 pale. 



Eighty-nine specimens about 48 to 60 mm. (37 to 47 mm. to base 

 of caudal) long, were secured by the Mission in the Gulf of Guayaquil, 

 off Puerto Pizarro, Peru. These specimens were compared with 

 others from Panama Bay, with which they agree. They formed the 

 basis for the first record of the species from as far south as the Gulf 

 of Guayaquil (Hildebrand, 1943a, p. 85). 



Range. — Gulf of Cahfornia (Rio Yaqui) to Gulf of Guayaquil 

 (Puerto Pizarro, Peru). 



ANCHOA NASO (Gilbert and Pierson) 



Anchoveta 

 Figure 21 



Slolephorus naso Gilbert and Pierson, in Jordan and Evermann, 1898, p. 2813, 



Panama Bay (original description; compared with S. starksi). 

 Anchovia naso Gilbert and Starks, 1904, p. 43, Panama Bay (description; 



compared with S. starksi). — Meek and Hildebrand, 1923, p. 201, Panama 



Bay (synonymy; description). 

 Anchoa naso Hildebrand, 1943a, p. 100, fig. 43, Panama Bay, Gulf of Guayaquil, 



Santa Island, and Cabo Blanco, Peru (synonymy; description; range). 



Head 3.15 to 3.35; depth 4.1 to 5.25; D. 14 to 16; A. 24 to 27; P. 

 13 to 15; scales about 40 to 43; vertebrae 40 to 42 (eight specimens 

 dissected). 



Body quite elongate, rather strongly compressed, greatest thickness 

 about equal to depth of caudal peduncle; ventral outline somewhat 

 more convex than the dorsal; chest and abdomen with a narrow edge; 

 head long and low, its depth at joint of mandible generally slightly 

 greater than its postorbital length; snout very long, projecting nearly 

 its whole length beyond tip of mandible, 4.8 to 5.7 in head; eye 3.8 to 

 4.7; postorbital part of head 5.75 to 6.3 in length; maxillary moder- 

 ately pointed, extending to or slightly beyond joint of mandible, 1.25 

 to 1.45 in head; mandible 1.45 to 1.6; cheek long, narrow, equal to or 

 longer than snout in large examples, shorter in young; gill rakers 

 rather shorter than snout, 23 to 27 on lower, and 21 or 22, rarely 23 

 or 24, on upper limb of first arch; scales mostly lost, with rather even 

 edges ; dorsal fin with concave margin, the longest rays failing to reach 

 tip of last one if deflexed, origin of fin equidistant from base of caudal 

 and some point over anterior half of eye; anal moderately long and low, 

 its origin under posterior half of base of dorsal but well in advance of 

 base of last ray, base 3.8 to 4.3 in length; ventral reaching somewhat 



<52J264— 45 S 



