25 FISHES OF SINALOA. 397 
much produced backward, less than half length of pec- 
toral spine, its surface not granular, covered by skin. 
Adipose fin half length of anal, its posterior margin little 
free. Upper lobe of caudal longest and somewhat fal- 
cate, about as long as head. Ventrals unusually long 
about reaching anal in females, shorter in the males. Vent 
_ much nearer base of ventrals than anal. 
Color olive green, with bluish luster, white below; upper 
fins dusky olivaceous; caudal yellowish dusky at tip; 
anal yellowish with a median dusky shade; ventral yel- 
lowish, the basal half of the upper side abruptly black; 
pectorals similarly colored, the black area rather smaller; 
maxillary barbel blackish; other barbels pale. 
Length, 12 to 18 inches. 
The following specimens from Dr. Gilbert’s Mazatlan 
collections are registered in the United States National 
Museum: 
ZOOL: 28,180, 2S ZL" 26,263 C2), 20,220.) (20,232 
28,276, 28,304. 
This species is nearest allied to Galezchthys seemanni 
(Giinther), a Panama species. Galezchihys jordant 
(Eigenmann) from Panama differs in the gill rakers and 
in other regards. Galeichthys assimtlis is an Atlantic 
species, not yet known from the Pacific Coast. With 
each of these Galeichthys gilberti has been at one time or 
another confounded. Galezchthys gilberti ditfers from 
Galeichthys seemannt, as described by Dr. Eigenmann, in 
the absence of pectoral pore, in the shorter spines and in 
the fontanelle not quite reaching occipital process; ven- 
trals unusually long, no dark specks on side of belly, 
barbel short, compressed. As noted below, Galezchthys 
gilbert? bears a superficial resemblance to Vetuma platy- 
pogon. Its teeth are different, the ventrals are much 
longer, and the adipose dorsal much larger. Vetuma 
