472 CALIFORNIA ACADEMY OF SCIENCES. IOO 



The specimens recorded by Eigenmann from San Diego 

 Bay as Gerres cinereus var. (Amer. Nat., 1891, 156) 

 seem to be Eucinostomus calif or niensis. 



166. Xystaema cinereum (Walbaum) . Mojarra Blanca. 

 Very abundant at Mazatlan, being one of the staple 



food fishes, and reaching a length of nearly two feet; its 

 flesh is of an excellent quality. The species was found 

 by Dr. Gilbert at Mazatlan and Panama, and seems to be 

 generally common along the coast. Like the rest of the 

 genus, it occurs in shallow water on sandy bottoms, away 

 from the surf. 



167. Gerres peruvianus Cuvier & Valenciennes. Mo- 

 jarra DE LAS ALETAS AmARILLAS. 



This small species is abundant at Mazatlan, although 

 less common than Eucinostomus calif "orniensis, and Ays- 

 lama cinereum. It rarely exceeds six inches in length. 



Gerres brevirostris Sauvage, from Rio Guayas, near 

 Guayaquil, is not evidently different from this species. 



168. Gerres lineatus (Humboldt). Mojarra China. 

 (Gerres axillaris Gunther^). 



Rather common at Mazatlan, with the preceding, but 

 reaching a rather larger size, from eight to twelve inches, 

 and frequently used as food. It was found by Dr. Gilbert 

 at Mazatlan, and has been recorded from Acapulco by 

 Humboldt and Bradley, from San Bias by Nichols, and 

 from Chiapam by Giinther. 



Family CIRRHITID^. 



169. Cirrhites betaurus Gill. 



The young of this species, from two to six inches in 

 length, are very abundant in rock pools about Mazatlan, 

 where numerous specimens were obtained by us, as well 



