FROGS OF COLOMBIA — COCHRAN AND GOLN 



501 



nostril; palpebral membrane not reticulate; interorbital distance 

 slightly greater than width of upper eyelid, which is about equal to 

 the distance between nostrils. Tympanum moderately distinct, about 

 one-third the diameter of eye, separated from eye by a distance nearly 

 equal to one-half its own diameter. Webbing between fingers 3 and 4 

 reaching to base of penultimate phalanges of both, a trace of web 

 between fingers 2 and 3, fourth finger considerably longer than second, 

 just reaching to base of disk of third which is about l)i times the 

 tympanic area; no projecting rudiment of a pollex; no ulnar ridge; 

 humeral spine palpable. Toes more than one-half webbed, the web 

 on fourth toe reaching the base of penultimate phalanx, third and 

 fifth toes subequal, disk of fourth toe just covering the tympanic 

 area; a distinct oval inner and a smaller but equally distinct rounded 

 outer metatarsal tubercle; no tarsal ridge, no dermal appendage on 

 heel. Body moderately elongate, in postaxillary region a little narrower 

 than greatest width of head; when hind leg is adpressed, heel reaches 

 tip of snout; when limbs are laid along the side, knee and elbow 

 slightly overlap; when hind legs are bent at right angles to body, heels 

 slightly overlap. No patagium. Skin of upper parts smooth; no dis- 

 tinct narrow glandular ridge encircling upper part of tympanum; 

 skin of throat and chest smooth, that of belly and lower surface of 

 thigh uniformly and very finely granular; traces of a skinfold across 

 chest; adult male, vocal sac apparently internal. Skin of head not 

 co-ossified with skull, roof of skull not exostosed. 



Dimensions. — Head and body, 21.7 mm.; head length, 5.8 mm.; 



Figure 49. — Cenlrolenella antioquiensis, AMNH 1353 (X 2). 

 337-262—70 33 



