THE SHORE FISHES OF PERU 335 



mens notably darker than others; the hghter specimens with dark 

 lines along the rows of scales on lower part of side; pectoral very 

 dark at base, otherwise mostly pale olivaceous; other fins rather dusky. 



This species is represented by seven specimens, 140 to 170 mm. 

 (110 to 126 mm. to base of caudal) long, obtained by the Mission. 

 Eleven additional specimens, 45 to 170 mm. (33 to 128 mm. to base 

 of caudal) long, included in the U. S. National Museum collection, 

 mostly obtained by R. E. Coker, also were examined. These speci- 

 mens were all used in obtaining the proportions and enumerations 

 given in the description. The specimens secured by the Aiission 

 were taken with trammel and gill nets set near rocks in Paita Bay, 

 Guanape Island, North Chincha Island, and San Juan Bay. The 

 other specimens examined are from Mollendo, Callao, and Santa 

 Rosa Island. 



This species seems to have numerous common names, which prob- 

 ably also are applicable to C. intercrusma, from which it very probably 

 is not distinguished by fishermen. In M. J. LobelPs field notes the 

 names "castaneta" and "burrito" are used for both species. Casta- 

 neta is also given for Nexilosus latifrons. C. crusma apparently is of 

 little, if any, commercial value. 



Range. — Coasts of Peru and Chile. 



CHROMIS INTERCRUSMA Evermann and Radcliffe 



Figure 71 



fHeliases crusma Cuvier and Valenciennes, 1833, p. 510, Valparaiso and Juan 



Fernandez Island, Chile (specimen described from Juan Ferndndez Island 



probably of this species). 

 Chromis intercrusma Evermann and Radcliffe, 1917, p. 119, pi. 11, fig. 3, 



Guaiiape North Island, Peru (synonymy; original description; compared 



with crusma). 



Head 3.2 to 3.9; depth 1.9 to 2.2; D. XII, 13 to 15 (usually 14); 

 A. II, 13 or 14; P. 19 to 21 ; scales 27 to 29, vertical series along middle 

 of side; vertebrae 24 or 25 (two specimens dissected). 



Body moderately short and deep, strongly compressed, its greatest 

 thickness about 2.5 in its depth; back strongly elevated; outline 

 nearly straight over snout and eyes, strongly convex at nape; caudal 

 peduncle moderately long, strongly compressed, 1.8 to 2.4 in head; 

 snout short, moderately blunt, 3.5 to 4.5; eye 3.1 to 4.3; interorbital 

 2.0 to 3.8; mouth small, oblique, terminal, or slightly superior; 

 maxillary extending to vertical from anterior margin of eye, 2.8 to 

 3.2 in head; each jaw with an outer series of somewhat enlarged 

 conical teeth, followed anteriorly by a narrow band of smaller conical 

 teeth (all rather blunt in some of the larger specimens); gill mem- 

 branes very slightly connected, free from the isthmus; gill rakers 

 slender, fully half length of eye, 19 to 23 on lower and 6 to 8 on upper 

 limb of first arch; margin of preopercle entire; suborbital fully adnate 



