88 Field Museum of Natural History — Zoology, Vol. X. 



In general appearance this species resembles G. episcopa, the dorsal 

 fin is more posterior, the head much shorter, and the dorsal and anal 

 fins smaller. 



Pacific slope of eastern Panama. 



Gambusia darienensis sp. nov. 



Type No. 7597, F. M. N. H.; length 35 mm.; Rio Capeti, Panama. 



Head 4.0 to 4.2; depth 3.5 to 3.6; D. I, 6 or 7; A. II, 6 or 7; scales 

 8-30. 



Body elongate; the dorsal region little elevated; mouth small, the 

 gape extending about }4 distance to eye; teeth in several series, the 

 outer enlarged; snout 3.7 to 3.8 in head; eye 3.0 to 3.2; origin of dorsal 

 behind anal fin, its distance from base of caudal 2.3 to 2.4 in its distance 

 from tip of snout, about midway between tip of caudal and opercle 

 or posterior margin of eye; anal fin with margin nearly straight, the 

 tip of first rays scarcely reaching those of last rays when the fin is de- 

 flexed; longest anal rays 1.2 to 1.3 in head; ventrals reaching anal; 

 caudal fin rounded; caudal peduncle 1.4 to 1.5 in head; gill-rakers 13; 

 18 scales before dorsal fin. 



One male (29 mm.) has head 3.9; depth 4.4; snout 3.6 in head; eye 

 3.4; modified anal .75, its tip reaching about ^ distance to base of 

 caudal fin. 



Color ? olivaceous, uniform, the margin of the scales lighter; 

 c? with about 20 narrow vertical dark bars on sides behind pectoral 

 fin, sides without dark spots, otherwise like the female. 



The caudal fin is more rounded on this species than in any of the 

 others. It is especially characterized by its small dorsal fin which 

 is well posterior of the anal fin. The tips of first rays of the anal fin 

 do not reach tips of last rays when the fin is deflexed. 



Tuyra River basin. 



Family CICHLID^. 



Cichlasoma umbriferum sp. nov. 



Type No. 7598, F. M. N. H.; length 195 mm.; Rio Cupe, Cituro, 

 Panama. 



Head 2.3 to 2.6; depth 2.4 to 2.6; D. XVII, 11; A. VI, 8; scales S3- 



Body elongate, rather robust ; anterior profile evenly ton vex to eye, 



straight or slightly concave on snout; lower margin of upper lip on 



level with lower portion of eye and upper edge of base of pectoral; jaws 



