1903.] NATURAL SCIENCES OF PHILADELPHIA. 739 



as evidently having been obtained at Callao, could it not have been 

 brought there from the neighboring mountains? There is little to dis- 

 tinguish it in the original account from G. archceus, still it may be a 

 salt-water representative. 



ATHERINOPSIS Girard. 



Proc. Acad. Nat. Sci. Phila., 1854, p. 134 (calif orniensis). 



Atherinopsis californiensis Girard. 



L.c, San Francisco, Cal. (Dr. A. L. Heermann.) 



Atherinichthijs californiensis Giinther, Cat. Fish. Brit. Mus., Ill 1861 



Chirostoma calif orniense Jordan and Gilbert, Proc. U S Nat Mus III 1880 

 p. 29. San Diego, California. '' ' °° ' 



Atherina storeri Ayres, in Girard, I.e., 1856, p. 136. 



Head ^^, depth 5^; D. IX-I, 12; A. I, 22; P. I, 16; V. I, 5; scales 

 about 73 m lateral series to base of caudal (squamation injured); 

 51 before spinous dorsal; about 15 in oblique transverse series between 

 origins of soft dorsal and anal; width of head 2^ in its length; depth 

 of head If; snout 3^; eye 4|; tip of upper jaw to corner of mouth 5- 

 to end of maxillary 3f ; interorbital space 3|; length of depressed dor- 

 sal 2|; base of soft dorsal 2; base of anal 1; pectoral \j\; ventral 2\; 

 least depth of caudal peduncle 3^; length of caudal peduncle from' 

 base of last dorsal ray If. 



Body elongate, well compressed, fusiform, and greatest depth a 

 httle before origin of ventral. Sides slightly convex. Caudal pedun- 

 cle elongate, strongly compressed, and least depth close to base of 

 caudal. Head elongate, pointed, compressed, greatest width in middle 

 of postocular region, and also equal to greatest width of trunk at bases 

 of pectorals. Side of head more or less flattened, becoming conspicu- 

 ously constricted below eyes. Snout broad, jaws produced, so that 

 upper is bluntly pointed when viewed from above. Eye high, not 

 impinging on upper profile, and posterior rim a little posterior to middle 

 of head. EyeUd somewhat thick and adipose-like. Mouth high 

 nearly horizontal and upper jaw slightly longer than lower Pos- 

 teriorly gape of mouth turns obliquely down. Premaxillaries not 

 protractile or with a distinct frenum above separating them from 

 snout. Maxillary narrow, its distal expanded portion about half of 

 pupil, oblique, upper portion more or less concealed below prcorbital 

 and falling well short of front orbital rim. Articulation of mandible 

 with quadrate nearly opposite front rim of orbit, and expanded some- 

 what m front till equal to orbit. Each ramus of mandible high and 

 well elevated inside of mouth. Teeth in jaws small, pointed, and bi- 



