86 U.S. NATIONAL MUSEUM BULLETIN 288 



concealed; and the clavicles and procoracoids, if present, are strongly 

 curved. 



Description. — FM 89, from lower Rio Apaporis, Amazonas, Colom- 

 bia. A microhylid without vomerine teeth; choanae moderate in size, 

 laterally ovate and lying well forward in the mouth; tongue not more 

 than half as wide as mouth opening, elongate, its posterior border 

 free and unnotched. Snout rather large for a microhylid, somewhat 

 truncate when viewed from above, quite pointed in profile, the upper 

 jaw extending very considerably beyond lower; nostrils lateral, not 

 visible from dorsal view, not projecting, their distance from end of 

 snout slightly more than one-half that from eye, separated from each 

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

 sharply denned; loreal region flattened and flaring inward toward 

 the upper lip. Eye rather large for a microhylid, moderately prom- 

 inent, its diameter equal to its distance from nostril; palpebral mem- 

 brane not reticulate; interorbital distance about three times the 

 width of upper eyelid, which is even less than the distance between 

 nostrils. Tympanum very distinct, its diameter about equal to 

 greatest diameter of eye, separated from eye by a distance less than 

 one-fourth its own diameter. Fingers without a trace of web at base, 

 fourth finger but slightly longer than second, just reaching to base 



Figure 5. — Otophryne robusta, FM 89 (same size). 



