THE SHORE FISHES OF PERU 



245 



specimen may have become even darker since the foregoing descrip- 

 tion was wTitten, as the dark bars have virtually disappeared. 



The description is based on the specimen (U.S.N.M. No. 77632) 

 described by Evermann and Radcliffe (see reference above) as C. 

 serrijer, which is the only one of this apparently new species among 

 the collections studied. This specimen, which becomes the type, is 

 now 255 mm. (205 mm. to base of caudal) long and was taken at 

 Capon, in the vicinity of Tumbes, by R. E. Coker. It was compared 

 with a specimen (U.S.N.M. No. 80542), of exactly the same size, from 

 Panama Bay, which in turn was compared with the smaller type 

 specimens (U.S.N.M. No. 17546) of C. serrijer, 151 and 167 mm. long 

 to base of caudal. The specimen from Panama apparently is identical 

 with the type material of C. serrijer, which is from Boca Soled ad, west 

 coast of Baja California. 



The Peruvian specimen differs from the Panama Bay specimen, as 

 well as from specimens from the Atlantic coast of Panama, identified 

 as C. nobilis, in so many respects that it must be considered a distinct 

 species. The differences between the specimen from Peru and the 

 one from Panama Bay are set forth iu the following comparisons. 

 The examples from the opposite coasts of Panama, as ah-eady pointed 

 out by Meek and Hildebrand (1925, p. 522), do not seem to be separa- 

 ble, though larger series might reveal differences. Therefore, it is 

 to be assumed that the Peruvian specimen differs from the Atlantic 

 coast specimens in the same characters and to about the same degree 

 as it does from the Panama Bay one, which herein is referred to 

 C. nobilis. The Peruvian specimen is named macrops because of its 

 big eyes. 



C. macrops C. nobilis 



Eye large, nearly as long as snout, 3.6 

 in head. 



Preorbital scarcely half width of eye, 

 10.8 in head. 



Interorbital broad, 3.8 in head. 



Angle of preopercle greatly produced, 

 with a very large spine, the first two 

 spines below angle directed down- 

 ward and backward. 



Scales mostly cycloid, those in lateral 

 line somewhat reduced, not striate; 7 

 horizontal rows between lateral line 

 and base of first dorsal ;^piue, and 5 

 between lateral line and base of first 

 soft ray of dorsal. 



Second anal spine a little longer than 

 the third and scarcely stronger, 2.1 

 in head. 



Pectoral reaching far beyond tip of 

 ventral, 3.5 in length. 



Body slender, the depth 3.3 in length. 

 624264 — 45 17 



Eye notably smaller, much shorter than 

 snout, 4.7 in head. 



Preorbital nearly as wide as eye, 5.5 in 

 head. 



Interorbital narrower, 5.1 in head. 



Angle of preopercle little produced, 

 with a much smaller spine, the first 

 two spines below angle directed down- 

 ward. 



Scales mostly ctenoid, those in lateral 

 line greatly reduced, mostly striate; 

 5 horizontal rows between lateral line 

 and base of first dorsal spine, and 4 

 between lateral line and base of first 

 soft ray of dorsal. 



Second anal spine much longer than the 

 third and very much stronger, 1.9 in 

 head. 



Pectoral reaching opposite tip of ventral, 

 4.0 in length. 



Body deeper, the depth 2.9 in length. 



