348 U. S. NATIONAL MUSEUM BULLETIN 206 



further than where the posterior tympanic border would have ap- 

 peared. The tympanum is not suggested even in the hardened 

 specimen, the diagonal fold seeming to cross the normal region of the 

 tympanum. The fingers show a slight lateral ridge, more definite 

 in some than in others, while the fringe on the toes is rather prominent 

 proximally in most specimens. No vomerine teeth can be found, 

 although the bony projection on which they would have arisen can 

 be felt and in a few cases seen between the choanae. The ventral 

 disk is quite evident in most of the specimens, although apparently 

 it had no adhesive qualities. The smallest individual measures 19 

 mm. and is well past the tadpole stage. 



Specimens examined 



BRAZIL: 



MiNAS Gerais: UZMK 23, Lund, Mar. 4, 1841. Lagoa do Curralinho, near 

 Lassance, USNiM 98146-9, Cochran, Dias, and Venancio, Mar. 21, 1935. 

 Lag6a Santa, UZMK 22 (type of Gomphohates marmoratus) , Reinhardt. 

 Pirapora, USNM 98272-81, Cochran, Dias, and Venancio, Mar. 22-3, 1935. 

 Rio Pandeiro, IB 274. 

 Rio Grande do Sul: Porto Alegre, USNM 97183, Gliesch, 1923; ZMB 6800, 



Hensel. 

 Sao Paulo: Emas, USNM 129189, Vanzolini and Bokermann, Dec. 2&-31, 1947. 

 ARGENTINA: Santa F6, USNM 97229, 1920. 

 BOLIVIA: Buena Vista, USNM 93215-7, Steinbach. 

 PARAGUAY: Chaco, USNM 69875. 



Physalaetnus gracilis (Boulenger) 



Plate 32, Figures a, b 



1867. Gomphobates notatus (not of Reinhardt and Liitken) Hensel, p. 138. 



1883. Paludicola gracilis Boulenger, p. 17 (type locality, Rio Grande do Sul); 

 1885a, p. 195, 1886a, p. 413; 1886b, p. 441.— Boettgbr, 1885, p. 244; 

 1892, p. 30.— Peracca, 1895, p. 25.— Berg, 1896, pp. 150, 177.— Brandes 

 and ScHOENiCHEN, 1901, p. 403. — Baumanw, 1912, p. 162. — Nibdbn, 

 1923, p. 506.— Marelli, 1924, p. 585.— Mertens, 1925a, p. 16; 1926b, 



p. 4.— MiRANDA-RlBEIRO, 1926, p. 160.— ElSENTRAUT, 1932, p. 317. 



1885. Paludicola ranina Cope, 1885a, p. 186 (type locality, S5o JoSo de Monte 



Negro, Rio Grande do Sul). 

 1927. Physalaemus gracilis Parker, 1927b, p. 462. 



Description. — Adult male, USNM 96756, Bonito, Serra da Bocaina, 

 Rio de Janeiro. Vomerine teeth absent; tongue moderately large, 

 about one-half the v/idth of mouth-opening, oval, its free posterior 

 border not indented; snout fairly elongate, rounded at the tip when 

 seen from above and in profile, the upper jaw projecting considerably 

 beyond the lower. Canthus rostralis rounded but fairly evident, the 

 loreal region deeply concave. Eye moderate in size, fairly prominent, 



