gI FISHES OF SINALOA. 463 
dachner) from Pomadasvs leuciscus (Giinther). We have 
reached the conclusion that all of these forms belong to 
one species, and that e/ongatus, as we have understood it, 
cannot be maintained as a separate species. The two 
supposed torms have been recorded from various places 
between Guaymas and Panama. The name e/ongatus 
was first applied toa Peruvian specimen, which is possibly 
different from /euc7scus, 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 
Prot. Bradley2] Phe 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 
fitteen 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. : 
