334 U. S. NATIONAL MUSEUM BULLETIN 2 06 



commonly twice as large as the male. When fully adult, the mandible 

 of the latter shows a plate of complete odontoids, which do not pene- 

 trate the skin, remaining entirely hidden under it. The symphysis 

 begins in two superior processes which are packed into a corresponding 

 depression at the base of the maxillaries. The larvae are quite large, 

 larger than those of Pseudis; those of males equal the body length of 

 metamorphosed females, and those of females double this length. 



It seems fitting to accept the full generic status for this giant frog, 

 which attains a larger size than any other in Brazil except Leptodadylus 

 ocellatus, Hyla maxima, and Bufo marinus and its allies. It is closely 

 related to Elosia in the possession of small but prominent patches of 

 vomerine teeth, in its typically divided upper toe and finger disks, and 

 in its fringes around the digits, while its chief differences from Elosia 

 lie in its broader head, shorter hand and tibia, and in its much greater 

 size. 



Megaelosia goeldii (Baumann) 



Plate 30, Figures e-g 



1912. Hylodes goeldii Baumann, pp. 91, 161, pi. 4, figs. 2,a, 2,b (type locality, 

 Organ Mountains, Rio de Janeiro). — Nieden, 1923, p. 462. 



1923. Megaelosia bufonia (not of Girard) Miranda-Ribeiro, 1923b, p. 820; 1926, 

 p. 28, figs. 14, 15, pi. 3.— Mello-Leitao, 1937, p. 329. 



1927. Elosia goeldii L. Muller, p. 270. 



1930. Elosia massarti deWitte, 1930a, p. 221, pis. 2, 3 (type locality, Alto da 



Serra, Sao Paulo). 



1931. Megalelosia goeldii A. Lutz, p. 236, pi. 65, figs. 12, 13, pi. 67, figs. 26-28. 



Description. — Adult female, USNM 96763, Bonito, Serra da 

 Bocaina, Rio de Janeiro. Vomerine teeth in two short, heavy, well- 

 separated, transverse patches between the posterior borders of the 

 choanae; tongue about one- third as wide as mouth-opening, nearly 

 round, not indented on its slightly free posterior border; snout bluntly 

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

 extending well beyond the lower; nostrils lateral, scarcely projecting, 

 midway between snout and anterior corner of eye, separated from 

 each other by an interval equaling about 1 }i times their distance from 

 eye; canthus rostralis rounded, sloping into the concave loreal region; 

 upper lip flaring out from loreal region and bluntly ridged for its 

 entire length. Eye large and prominent, its diameter very nearly 

 as great as its distance from end of snout; interorbital diameter about 

 1% times the width of upper eyelid, equal to that between nostrils. 

 Tympanum small, not very prominent, separated from eye by an 

 interval equal to twice its own diameter. Fingers free, their tips 

 dilated into small disks, their sides with narrow dermal fringes, 

 fourth much longer than second, which reaches only to base of ante- 



