ZOOLOGY — FISHES. 91 



circular; its diameter entering four times and a half in tlie length of the side of the head. Anterior margin of dorsal fin nearer 

 the extremity of the snout than the insertion of the caudal. Base of anal fin entering ahout ten times in the total length. Inser- 

 tion of ventrals opposite the posterior third of the base of the dorsal fin. Bluish black above ; yellowish or whitish beneath, 

 with metallic reflects. Fins unicolor. 



953. San Francisco, California. Dr. A. L. Heermann. 



43. ENGRAULIS NANUS, Grd. 

 Gen. Rep. 335. 



Spec. Char. — Body short and slender, tapering posteriorly, and very much compressed. Head constituting the third of th^ 

 length, the caudal fiu excluded. Snout sub-conical. Posterior extremity of maxillar bone extending to the interopercle. Eye 

 1 arge and sub-circular ; its diameter entering four times and a half in the length of the side of the head, exactly once in 

 advance of its anterior rim. Anterior margin of dorsal fin equidistant between the tip of the snout and the fork of the caudal 

 fin. Base of anal fin entering six times and a half in the total length. Vent situated immediately in advance of the anterior. 



946. San Francisco, California. Dr. A. L. Heermann. 



