FROGS OF COLOMBIA — COCHRAN AND GOIN 513 



Dimensions. — Head and body, 26.1 mm.; head length, 8.6 mm.; 

 head width, 10.3 mm.; femur, 17.1 mm.; tibia, 18.7 mm.; heel-to-toe, 

 23.3 mm.; hand, 10.1 mm. 



Color in alcohol. — Top of head, dorsum, top of forearm and hand, 

 top of thigh, shank and foot all a very dark gray with just a hint 

 of blue in it. The dark gray ground color marked with thickly scat- 

 tered, roundish, pale spots which average about one millimeter in 

 diameter. The entire ventral surface is a pale cadaverish gray. 



Remarks. — Since only one specimen is known of this distinctive 

 little frog, nothing can be reported on variation. 



We take pleasure in dedicating this species to Dr. Fred Medem, 

 who discovered it. 



Centrolenella grandisonae, new species 



Figure 53 



Holotype.—BM 1910.7.11.68, collected at Pueblo Kico, Caldas, 

 southwestern Colombia, 5,000 feet altitude, by H. G. Palmer. 



Diagnosis. — A centrolenid with vomerine teeth, well-developed 

 humeral spines, and a distinctive pattern of white spots on the back. 



This new species can be distinguished from all Colombian Centrole- 

 nella except medemi and parabambae by the presence of vomerine 

 teeth. It can be distinguished from medemi by having the dorsal 

 light spots restricted to a definitive pattern on the top of head and 

 dorsum but absent on the upper surfaces of the limbs, and from 

 parabambae by having a dorsal pattern of light spots rather than 

 being uniformly pigmented above. 



Description oj ' holotype. — Vomerine teeth present in two short, fleshy 

 mounds lying between the rounded choanae, two teeth in left mound, 

 one in right; tongue not quite one-half as wide as mouth opening, 

 broadly rounded, its posterior border not free and unnotched; snout 

 moderate, somewhat U-shaped when viewed from above, truncate in 

 profile, the upper jaw extending but slightly beyond lower; nostrils 

 more lateral than superior, not projecting, their distance from end of 

 snout about one-half then distance from eye, separated from each 

 other by an interval equal to their distance from eye. Can thus rostralis 

 slightly defined; loreal region concave and quite oblique, the upper lip 

 flaring out below it. Eye large, very prominent, its diameter greater 

 than its distance from nostril; interorbital distance about equal to 

 width of upper eyelid, which is relatively wide and slightly greater 

 than distance between nostrils. Tympanum distinct, about one- 

 fourth the diameter of eye, separated from eye by a distance about 

 equal to its own diameter. Fingers webbed at base, web extending 

 from distal third of antepenultimate phalanx of third finger to base of 

 penultimate phalanx of fourth; fourth considerably longer than 



