129 FISHES OF SINALOA. 5OI 



about the same size. It was also found by Richardson at 

 La Paz and by Gilbert at Mazatlan. It has been recorded 

 from Cape San Lucas by Xantus and from San Cristobal 

 Bay by Townsend. The Pacific form called Labrosomus 

 xanti seems to be scarcely if at all distinguished from 

 the West Indian form, nuchifiinnis, cognate to it. The 

 only difference we have found is in the dentition of the 

 vomer, and this may not be constant. 



218. Labrosomus delalandi (Cuvier & Valenciennes). 

 Extremely common in rock pools at Mazatlan, where 



it was also found by Dr. Gilbert. It has not been no- 

 ticed from any other locality on the Pacific Coast. 

 Thus far we have not been able to distinguish it from La- 

 brosomus delalandi of the coast of Brazil. 



219. Enneanectes carminalis (Jordan & Gilbert) n. gen. 

 Plate liii. 



Four specimens, types of the species, were found by 

 Dr. Gilbert in a rock pool at Mazatlan. A single small 

 example was obtained by us. 



The short chubby body, large rough -ctenoid scales, 

 little rounded profile, and short fins distinguish this spe- 

 cies sufficiently from Tripterygion Risso, and character- 

 ize the new genus Enneanectes, framed for it by Jordan 

 & Evermann. 



220. Auchenopterus monophthalmus Giinther. 

 Several specimens taken in rock pools at Mazatlan. 



At low tide it is often left by the recession of the water, 

 in which case it creeps about in the Corallina. 



In this species the first dorsal is higher and better sep- 

 arated from the rest of the fin than in the California spe- 

 cies, Auchenopterus integripinnis, and there are some 

 constant differences in coloration. 



