82 U.S. NATIONAL MUSEUM BULLETIN 2 88 



heels overlap slightly. Skin of upper parts smooth; a narrow, indistinct 

 skinfold across back of head which, behind the eyes, becomes more 

 distinct and passes downward and backward to terminate behind the 

 angles of the jaw. Skin of body smooth except under the throat 

 where it bears distinct, rounded, pimple-like granules and the lower 

 surface of the thigh which is uniformly and very finely granular; 

 no traces of a skinfold across chest; adult male; no vocal sac apparent. 



Dimensions. — Head and body, 62.2 mm.; head length, 15.2 mm.; 

 head width, 20.5 mm. ; femur, 27 mm. ; tibia, 29 mm. ; heel-to-toe, 41.7 

 mm.; hand, 16.8 mm. 



Color in alcohol. — In preservative the specimen is rather uniformly 

 medium dark brown above, pale brown below. No evidence of a 

 distinctive pattern is discernible. 



Remarks. — We have had the opportunity of examining the specimen 

 (MLS 247) that Dunn (1949, p. 16) reported from Muzo and of com- 

 paring it with the one described above, and for the present, we cannot 

 agree with Dr. Dunn that it is surely Glossostoma aterrimum. The 

 webbing on the feet is only about half as extensive as on the specimen 

 described, and we cannot even palpate an unquestionable palatine. 

 This latter, however, may be due to the condition of the specimen, 

 for it is very soft; in fact, no hardened bones are palpable in any part 

 of the suspensorium. In color and general build the two specimens 

 are quite similar. 



G. aterrimum is a distinctly web-footed microhylid from west of the 

 Cordillera Oriental of Colombia, an analogue of Ctenophryne geayi 

 east of the Cordillera. While both species have webbed feet, we suspect 

 that this is evidence of convergence rather than close kinship, for the 

 two are quite different in general appearance, and the fact that pala- 

 tines are present in Glossostoma and absent in Ctenophryne does not 

 seem indicative of closely related species. 



Specimens Examined 

 COLOMBIA: 



Antioquia: 4 km. northeast of Bellavista, above Rio Porce, CNHM 63849. 

 Botaca: Muzo, MLS 247. 

 Caldas: Palestina, USNM 152145. 



Genus Ctenophryne Mocquard 



1904. Ctenophryne Mocquard, p. 308 (type species, Ctenophryne geayi Mocquard) 



Generic diagnosis. — Clavicles, procoracoids, and palatines absent. 

 Tympanum concealed. Snout pointed. 



Only one species is known from Colombia. 



