THE SHORE FISHES OF PERU 201 



small scales, with the view of finding other differences if they existed. 

 However, none was found. The specimens from California, as in- 

 dicated, have rather smaller scales than the southern material, though 

 the numbers overlap. As no differences in support of the smaller 

 scales were found, that character is regarded as of no specific signif- 

 icance. In one specimen from Callao 116 scales were counted, and 

 123 in another one from the same place, collected at the same time. 

 A wide variation among individuals in the number of scales present, 

 therefore, seems to exist within this species. 



Range.— Cnliiomm, Baja California, Peru, and the GaUpagos 

 Islands. Not yet recorded from intermediate localities. 



CAULOLATILUS AFFINIS, new species 



Peje-blanco 

 Figure 44 



Head 3.6; depth 3.55; D. IX, 26; A. II, 24; P. 19; scales 125. 



Body rather elongate, compressed, deepest over base of ventrals, 

 tapering rather strongly posterior to origin of anal, its greatest thick- 

 ness about two-thirds its depth ; profile anterior to dorsal convex, not 

 especially steep over snout and eyes; caudal peduncle short, com- 

 pressed, 3.3 in head; snout only moderately blunt, 2.8; eye moderate, 

 the surrounding membrane covering upper anterior portion of eye 

 (more so than in related species), 4.2 in head; interorbital 2.75; pre- 

 orbital notably narrower than eye; mouth rather small, slightly 

 oblique, terminal; maxillary, except for a small section, covered by the 

 upper lip, reaching nearly or quite to vertical from anterior margin of 

 eye, 2.6 in head; teeth in each jaw in a band anteriorly, reduced to a 

 single series posteriorly, the last tooth in upper jaw enlarged, the teeth 

 apparently rather larger than in related species; vertical margin of 

 preopercle mostly with a smooth, bony margin, a few short blunt 

 serrae at angle; gill rakers at angle somewhat shorter than pupil, 15 

 on lower and 7 on upper limb of first arch; lateral line complete, only 

 slightly arched; scales small, firm, ctenoid, becoming smooth on chest, 

 extending forward on posterior part of interorbital, present on cheek 

 and operclc, covering caudal fin except distally, extending on base of 

 pectoral, scarcely on base on ventral, and not at all on dorsal or anal; 

 dorsal long, continuous, the spines sharp, slender, rather short, in- 

 creasing very gradually in length from the third to the last, the longest 

 one 2.6 in head; soft part of fin rather notably higher than spinous 

 part, highest posteriorly, the third ray from the end of fin produced, 

 reaching base of caudal; caudal rather deeply lunate, several of the 

 middle rays of about the same length, the lobes acute, curved inward, 

 the upper one slightly the longer; anal very similar to soft part of dor- 

 sal, its base 2.4 in length; ventral inserted behind base of pectoral a 



