FROGS OF COLOMBIA — COCHRAN AND GOIN 363 



the choanae, in its very broad head, and in having the roof of the cranium heavily 

 exostosed. From Craspedoglossa it differs in its much broader head, in having the 

 top of the skull heavily exostosed, in having a distinct tympanum, in having the 

 tongue more extensively free behind and in the form of the terminal phalanges. 

 From Zachaenus it differs in having the roof of the cranium heavily exostosed, in 

 having the head much broader and flatter, and in lacking axillary wings (patagium) . 



Finally, its lack of toe webs and the presence of a distinct tympanum readily 

 distinguish it from both Odontophrynus and Cycloramphus, which are relatively 

 narrow-headed forms with pointed terminal phalanges. 



Perhaps all in all it has more characters that seem to be fundamental in common 

 with Zachaenus than with any of the other genera. Whether or not Zachaenus is 

 in fact its closest relative must await a more detailed study of the genera of 

 leptodactylids than has yet been made. 



Since this genus and species were first described, a second specimen 

 (CNHM 54591, from Caldas, between Pueblo Rico and Santa Cecilia) 

 has been located. Morphologically, this specimen differs from the type 

 in being larger (78.1 mm. in head-and-body length as compared to 

 51.5 mm. for the type), in having the roof of the skull a little more 

 heavily exostosed, and in having the tips of the toes expanded into 

 narrow disks. In coloration it is darker dorsally, and the throat, 

 chest, and undersurfaces of the thighs are more heavily mottled than 

 in the type. 



This record from the eastern slopes of the Andes indicates that 

 Amblyphrynus probably is rather widely distributed through the 

 northern Andes. 



Specimens Examined 

 COLOMBIA 



Caldas: Pueblo Rico, Santa Cecilia, CNHM 54591. 



Cundinamarca: Eight km. south of Gachala, San Isidro, 2,350 m., CNHM 

 81915 (holotype). 



Genus Borborocoetes Bell 



1843. Borborocoetes Bell, p. 34 (type species, Cystignathus grayii Giinther). 



Generic diagnosis. — Pupil horizontal. Tongue subcircular, entire 

 or slightly nicked behind. Vomerine teeth present. Fingers free; 

 toes free or nearly so. Terminal phalanges slightly expanded at tips. 

 Omosternum and sternum cartilaginous. Ethmoid arch completely 

 ossified above or nearly so. 



Borborocoetes columbianus Werner 



1899. Borborocoetes columbianus Werner, p. 480 (type locality, Monte Redondo, 

 in Buenavista, [Meta,] Colombia, 1,000-1,300 m.— Nieden, 1923, p. 393. 



No frogs identifiable as this species have come to hand, and the 

 type has not been examined. The small size of the type (stated as 



