Family XXII. Gobiid^e. 231 



Subgenus Gobionellus Girard. 



219. Qobius claytoni Meek. Clayton's Goby. 



Gobius claytoni Meek, Field Col. Mus. Pub. 65, 1902, 121; La 

 Antigua. 



Fresh and brackish waters on coast of Vera Cruz. (Vera Cruz; San 

 Francisco; Boca del Rio.) 



Head 3^; depth ^]/ 2 \ D. vi-12; A. 13; scales 15-42. Body elon- 

 gate, subterete, and tapering to caudal; head moderate; snout very 

 blunt; mouth terminal, broad, its gape horizontal; interorbital width 

 less than half diameter of the pupil ; diameter of eye equaling length of 

 snout, 3^3 in head; no scales on dorsal surface between spinous dorsal 

 and nape; spinous dorsal low, the longest spine about 2 in head; 

 caudal fin long and pointed, its middle rays the longest, about yi, 

 longer than head; pectoral i l i in head; ventral 1%; scales ctenoid; 

 breast and region under ventrals without scales. 



Color light olivaceous, somewhat reticulated above; side with 5 

 oblong dark blotches, the last and smallest one forming a black caudal 

 spot ; spinous and soft dorsals barred ; caudal fin barred ; the middle 

 portion of the ventrals, except a small central light patch, blackish; 

 some black on posterior half of anal fin ; a narrow dark curved streak 

 at base of pectoral fin ; a dark stripe on cheek and one downward and 

 forward from eye. Length about 3 inches. 



220. Gobius microdon Gilbert. 



Gobius microdon Gilbert, Proc. U. S. Nat. Mus., 1891, 554; San 

 Juan Lagoon, north of Rio Ahome, Mexico: Jordan & Ever- 

 mann, Bull. 47, U. S. Nat. Mus., 1896, 2227. 



Known only from the type locality. 



Head 4^6; depth 5; D. vi-13; A. 14; scales 62. Body and head 

 compressed, everywhere deeper than wide; snout blunt; mouth low, 

 terminal, nearly horizontal; the lower jaw very weak, broadly rounded 

 anteriorlv; maxillary reaching vertical from hinder margin of pupil, 

 about 2 in head ; teeth minute, those in the upper jaw in a single series ; 

 teeth, in lower jaw in two series, the outer somewhat enlarged; inter- 

 orbital space narrow, less than diameter of the pupil; isthmus wide, 

 the gill openings extending but little below the base of the pectorals ; 

 scales small, cycloid anteriorly and on belly, becoming larger poste- 

 riorly ; scales ctenoid on sides behind middle of spinous dorsal ; belly 

 wholly scaled; nape scaled forward nearly to orbits, but with a narrow 

 median naked streak running back to front of dorsal ; breast and sides 

 of head naked; dorsal fins not connected, first 4 spines filamentous, the 

 longest longer than the head; soft dorsal and anal similar, not high. 



