288 



U. S. NATIONAL MUSEUM BULLETIN 206 



1929. Elosia nana (sic) Luederwaldt, p. 39. 



?1 929. SZosta ranoides Luederwaldt, p. 39. 



1931. Basanitia lactea (not of Miranda-Ribeiro) A. Lutz, p. 239, pi. 65, figs. 10, 11 



(tadpole and caudate frog) . 

 1946. Hylodes nasus Myers, pp. 10, 28. 



Description. — Adult female, USNM 96258, Tijuca, city of Rio de 

 Janeiro. Vomerine teeth in two small, heavy, narrowly separated, 

 nearly straight patches between and slightly behind the posterior 

 borders of the choanae; tongue slightly more than half as wide as 

 mouth-opening, oval, not indented on its free posterior border; snout 

 rounded when viewed from above, slanting backwards towards the 



Figure 26. — Elosia nasus, USNM 96371: a, Dorsum; b, profile; both X 1. 



lip border in profile, the upper jaw consequently extending far beyond 

 the lower; nostrils lateral, scarcely projecting, their distance from end 

 of snout about three-fourths that of eye to snout, separated from each 

 other by an interval almost twice as great as their distance from eye. 

 Canthus rostralis sharply defined, the loreal region vertical and appear- 

 ing slightly concave because of the flaring out of the upper lip below 

 it in a distinct curving arch, leaving an arc-shaped channel along the 

 lower loreal region. Eye very large and prominent, its diameter equal 

 to its distance from end of snout; interorbital diameter equal to width 

 of the broad upper eyelid, about two-thirds that of distance between 

 nostrils. Tympanum large and very distinct, about two-thirds the 

 diameter of the eye, separated from eye by an extremely narrow inter- 

 val scarcely equal to one-fifth its own diameter. Fingers free, their 



