FISHES OF SINALOA. 473 



as by Dr. Gilbert. These small specimens are identical 

 with those obtained by Xantus at Cape San Lucas, the 

 types of Cirrhites hetaurus. It has been supposed that 

 these are the young of Cirrhites riviilatiis Valenciennes, 

 abundant about the Galapagos and Revillagigedos, as no 

 differences except those of color appear. The color differ- 

 ences are, however, strongly marked, and we are disposed 

 to let Cirrhites betaurus stand provisionally as a distinct 

 species. The coloration of betaurus has been well de- 

 scribed by Dr. Gill; that of rivitlatiis is well figured by 

 Dr. Giinther. 



First dorsal fin bright orange red in life ; second red- 

 dish; cross bands on body black. 



Family CICHLID^. 



170. Heros beani Jordan. Mojarra Verde. 

 Common in the deeper and more quiet places in the 



Rio Presidio, especially just below the village of Presidio. 

 It reaches a length of about eight inches, and is occasion- 

 ally taken by the hook, its habits being very similar to 

 those of the abundant sun fishes as seen in the more 

 northern waters. 



Adult light olive, banded with darker; black spots on 

 each scale. First dorsal edged with dark red, the two 

 black blotches and black bars obsolete. Young with the 

 bars distinct; no blue, yellow or red in life. 



Family POMACENTRIDv^. 



171. Eupomacentrus rectifraenum (Gill). Pescado 

 AzuL. (Poniacentrits analigutta Gill.) 



This beautiful fish is very abundant in the rock pools 

 about Mazatlan. It is excessively wary and hard to catch. 

 Great changes in coloration, due to age, have been no- 

 ticed by Dr. Giinther and others. The chief peculiarity 



2d Ser., Vol. V. (31) August 15, 1895 



