120 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. III. 



small, scarcely oblique, jaws equal; lips thin, a distinct frenum; 

 eye small, its diameter 4^ in the head; inferior margin of the 

 orbit above level of upper lip; snout long, 2. 1 { in head; outer 

 teeth large, brown at the tips; cheeks with six rows of scales. 

 Origin of dorsal fin over gill opening; first dorsal spine short, the 

 others gradually increasing to 4th which is 23 in head; last dorsal 

 spine 2i in the length of the head; middle rays of soft dorsal and 

 anal fins longest, the fins pointed, the tips of longest rays not 

 reaching to base of caudal; longest dorsal ray i^ in head; longest 

 anal ray i in head; caudal fin slightly emarginate; least depth 

 of caudal peduncle equals length of the snout; pectoral fins 

 short, i ?j- in head; ventrals i| in head, the latter not quite reach- 

 ing vent. 



Brownish, six indistinct dark bands on sides, a darker lateral 

 band which ends in a black spot at the base of the caudal; fins 

 all plain. 



One smaller specimen, 3.85 inches in length, has head 3^; 

 depth 2|; scales 6-33-11, longest dorsal ray 1 1 in head; longest 

 anal if. The dark bars and lateral band are less distinct; a black 

 caudal spot; a few brownish streaks on lower half of dorsal 

 and anal fins; the tips of pectorals reaching vent. 



This species appears nearest C. intermedium. It differs from 

 that species in having a higher spinous dorsal, and lower soft 

 dorsal, and the absence of whitish ocelli on vertical fins. Yenta 

 Salada. 



Cichlasoma parma (Gunther). 



A few small specimens from La Antigua, largest 1.3 inches, 

 body with cross bars, a black bar at base of caudal. 



Cichlasoma melanurum (Gunther). 



A few specimens were taken in the Rio Quiotepec at Cuicatlan. 



Heros istlanus Jordan & Snyder. 



This species is very abundant in Rio Ixtla at Puente de Ixtla, 

 and in the Rio Balsas ar*Balsas. 



GOBIID.E. 

 Philypnus dormitor (Lace"pede). 



Common at La Antigua. Largest specimen 10 inches in 

 length. 



