UATRAC'III.V SALIKNTIA. 51 



Fam. 2. ENGYSTOMATID^. 



BuFONiNA with free toes, ^^ith tlio processes of sacral vertebra di- 

 lated, and without paratoids. 



Sy^iojjsis of the Genera. 



1 . Engystoma. Head not distinct ; muzzle pointed ; tympanum 



hidden. Tropical America. 



2. Breviceps. Head and muzzle confounded with body ; tympanum 



hidden. South and West Africa. 



3. Chelydobatrachus. Head protruding, globidar ; tympanum di- 



stinct. Australia. 



1. ENGYSTOMA. 



Head verj small, not distinct from bodj- ; muzzle distinct, pointed ; 

 mouth small ; thigh and arms rather short ; teeth, none in jaws nor 

 in palate. Tongue elongate, elliptic, entii'e. Tj-mpanimi hidden ; 

 eustachian tiibcs very small. Fingers four, quite free ; toes five, 

 free. Males with an internal subgular sac. Tropical America. 



Engystoma, Fitz. N. aassif. Rept. p. 65 ; Bum. 8f Bibr. p. 738. 



Stenocepliakis, Tschudi, Butr. p. 86. 



Microps, Waglcr, Ids, 1828, p. 744, and Si/st. Amph. p. 200. 



Oxva-hvnclius, (^Valeric.} Guerin, Iconoffi: Rept. 



Biifo, sp., Rana, sp., auct. prior. 



The species of this genus exhibit no davieuln. 

 1. Engystoma ovale. 



Rana oralis, Schneid. Hist. Amph. p. 1-3 ; Shaw, Zool. iii. p. 3. 

 Bufo surinamensis, Dmul Rain. pi. 33. f. 2, and Rept. viii. p. 184. 



oralis, Daud. Rain. p. 92, and Rept. viii. p. 187. 



Rana bufouia, 3Icrr. Tent. p. 177. 



EngTstoma orale, Fitz. Neue Classif. Rept. p. 65 ; Dum. i^- Bihr. 



p."741. 

 OxjThyuchus bicolor, ( Valenc.) Guerin, Iconnr/r. Rept. pi. 27. f. 2. 

 Microps iinicolor, fVagl. I. c. 

 Stenocephalus microps, Tschudi, Batr. p. 86. 



Talon with only a single tubercle ; muzzle pointed ; eyes mode- 

 rate ; skin smooth ; a white streak along the hinder side of the 

 thighs. 



a. Adult. America. From Mr. Frank's Collection. 



2. Engystoma carolinense. 



Engystoma carolinense, Holbr. N. Amer. Heipet. v. p. 23. pi. 6 ; 



Dum. * Bibr. p. 743. 

 carolinense et olivaceum, Halloicell, Proc. Ac. Philad. 1856, p. 251. 



Talon with one (exceptionally with two) tubercles ; muzzle rather 



E 2 



