I20 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}^ in head; outer 

 teeth large, broAvn 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 2| in head; last dorsal 

 spine 2 J in the length ©f 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^ in head; ventrals I'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 6-33-1 1, longest dorsal ray i| 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. iiiicrjiicdiiim. 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 (Gunlher). 



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 at Balsas. 



GOBIID.E. 

 Philypnus dormitor (Lacepede). 



Common at La Antigua. Largest specimen 10 inches in 

 length. 



