62 OOBIID.E. 



first dorsal from tlic eye is more than that of the snout from the 

 pra^opercnhim. Tlie dorsal fins arc lower than the body ; none of the 

 spines produced : caudal rounded, one-ciglith of tlic total length : the 

 ventral terminates at a great distance from the anus, and has a very 

 broad basal membrane. Yellowish-olive : back and sides reticulated 

 with blackish ; head, dorsal, caudal and pectoral fins dotted with 

 blackish, the dots on the second dorsal forming internipted zigzag 

 streaks ; six cross-series of dots on the caudal ; an irregular, small 

 l)la clash spot on the upper part of the root of the pectoral ; ventral 

 and anal fins and the whole belly yello^nsh-Avhite. 

 Mexico. 



a, h. Fine specimens. Mexico. From M. Salle's Collection. 



inelics. lines. 



Total length 8 



Height of the body 1 1 



Length of the head 1 8 



Greatest width of the head 11 



Diameter of tlic eye 2| 



Length of the caudal fin I 



Closely allied to Gohius banana, but readilj- distinguished by the 

 smaller scales. 



116. Gobius transandeanus. 

 D. 6 I 11. A. 10-11. L. lat. 00-08. 



Fifteen longitudinal series of scales between the second dorsal fin 

 and the anal. The height of the })ody is contained seveii times in 

 the total length, the length of the head tliree times and three-fourths; 

 the head is flat, depressed, much broader than high, with the snout 

 elongate. Cleft of the mouth nearly horizontal, the upper jaw being 

 tlie longest. Canine teeth none ; teeth of the outer series enlarged. 

 The maxillary extends to the vertical from the anterior margin of 

 the eye. The width of the interorbital space equals the diameter of 

 the eye, which (in mature specimens) is one-fifth or one-sixth of the 

 length of the head. The head is naked ; scales ctenoid, on the nape 

 and on the anterior part of the body very small. The distance of 

 the first dorsal from the eye is considerably less than tliat of the 

 snout from the pra^operculum. The dorsal fins are higher than the 

 body, and the spines of the anterior dorsal arc prolonged into free 

 filaments (in mature specimens) ; caudal rounded, one-fifth of the 

 total length ; the ventral terminates at a great distance from the anus, 

 and has a very broad basal membrane. Yellowish : head, body, dorsal 

 and caudal fins irregularly spotted with blackish ; anal and ventral 

 uniform white or blackish. 



Fresh waters of Western Ecuador. 



a-b, c^d. Fine specimens. Western Ecuador. From Mr. Eraser's 

 Collection. 



