FISHES OF SINALOA. 463 



dachner) from Pomadasisleuciscits (Giinther). We have 

 reached the conclusion that all of these forms belong to 

 one species, and that elongatus , as we have understood it, 

 cannot be maintained as a separate species. The two 

 supposed forms have been recorded from various places 

 between Guaymas and Panama. The name elongatus 

 was first applied to a Peruvian specimen, which is possibly 

 different from leucisats, as we have seen none exactly like 

 Steindachner's figure. 



The young show yellowish shades on fins. Second 

 dorsal mottled with blackish; a diffuse dusky blotch on 

 opercular angle, and evident dark streaks, three or four, 

 along middle of sides. 



146. Orthopristis chalceus (Giinther). 



This species is generally common along the coast from 

 Guaymas to Panama. It was obtained by Steindachner 

 and Gilbert at Mazatlan, but no specimens were secured 

 by us. 



147. Isaciella brevipinnis (Steindachner). 



The original type of this species was obtained by Dr. 

 Steindachner at Mazatlan. A specimen from Panama, 

 now in the museum of Yale University, was obtained by 

 Prof. Bradley. The species seems to be rare, and no 

 specimens were secured by us. 



148. Microlepidotus inornatus Gill. Jopaton. 



Five specimens of this rare species, the largest about 

 fifteen inches in length, were obtained by us with dyna- 

 mite off the shore of the southernmost of the three Ven- 

 ados Islands. 



In life, steel-blue, with stripes of bright bronze; upper 

 fins with golden; caudal partly dusky; preorbital with 

 vertically oblong spots. 



