FROGS OF COLOMBIA — COCHRAN AND GOIN 153 



developed warts on the back. The lateral margin of postorbital process 

 of helmet makes a shelf above the tympanum; skin of throat and 

 chest thin and smooth, that of belly and lower femur very thin and 

 very finely granular; no skinfold across chest; no inguinal gland; 

 no apparent vocal sac. Skin of head not co-ossified with skull, roof 

 of skull exostosed and forming a well-developed casque. The helmet 

 is triangular in shape along the margin of jaws, the can thai ridges 

 curve and meet between the nostrils; above, the helmet terminates 

 posteriorly in two well-developed postorbital spines with a curving 

 posterior margin between them. On the side of the head the helmet 

 behind the eye and between the angle of jaw and the postorbital 

 spine is interrupted only by the tympanum. 



Dimensions. — Head and body, 44.4 mm.; head length (exclusive of 

 proboscis), 20.7 mm.; head width, 25.5 mm.; femur, 22.5 mm.; tibia, 

 25 mm.; heel-to-toe, 36.1 mm.; hand, 16 mm. 



Color in alcohol. — A very pale tan frog with a little dark brown along 

 the canthal ridge, a little above and behind the eyes, and above the 

 sacrum and above the tip of the urostyle. There are faint traces of 

 several narrow, darker stripes above the legs. 



Remarks. — The described specimen was the only one examined. 



Cerathyla johnsoni Noble 



Plate 23c-e 



1917. Cerathyla johnsoni Noble, p. 798, pi. 37 (type locality, Colombia, Antio- 

 quia, 14 mi. north of Mesopotamia, Santa Rita Creek) ; 1926a, p. 18. — 

 Dunn, 1944c, p. 517. 



1945. Cerathyla bubalis. — Myers and Carvalho, 1945, p. 21. — Gorham, 1963, p. 

 21. 



Diagnosis. — A Cerathyla with short (about 2 mm.) proboscis and 

 superciliary processes and with the tympanum separated from the 

 eye by a distance about equal the width of the tympanum. 



From C. proboscidea, the only other member of the genus now 

 known from Colombia, it can be distinguished by the shorter proboscis 

 and superciliary processes (2 mm. instead of 4 mm.) and by having 

 its tympanum separated from the eye by a distance equal to its 

 width rather than its height. 



Description. — CNHM 63850, from eight kilometers south of 

 Valdivia, Antioquia, Colombia. Vomerine teeth in a pronounced 

 V-shaped structure, anterior teeth in both rami of the V are enlarged 

 into a definite patch, palatine teeth in two well-developed series 

 nearly in contact medially and passing laterally nearly to the maxillary; 

 each mandible serrate along its entire length with fine, saw-tooth 

 odontoids with a much enlarged odontoid at the tip of each ramus. 



