BATRACHIA SALIENTIA. 51 



Fam. 2. ENGYSTOMATIDJE. 



Btjfonina with free toes, with the processes of sacral vertebra di- 

 lated, and without paratoids. 



Synopsis of the Genera. 



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



hidden. Tropical America. 



2. Breviceps. Head and muzzle confounded -udth body ; tympanum 



hidden. South and West Africa. 



3. Chelydobatrachus. Head protniding, globular ; tympanum di- 



stinct. Australia. 



1. ENGYSTOMA. 



Head very small, not distinct from body ; muzzle distinct, pointed ; 

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

 in palate. Tongue elongate, elliptic, entire. Tympanum hidden ; 

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

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



Engystoma, Fitz. N. Classif. Rept. p. 65 ; Dum, 8f Bibr. p. 738. 



Stenocephalus, Tsclmdi. Batr. p. 86. 



Microps, Wagler, Isis, 1828, p. 744, and Syst. Amph. p. 200. 



Oxvrhjaiclius, (^Vctlenc.) Giierin, Iconogr. Rept. 



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



The species of this genus exhibit no clavicula. 

 1. Engystoma ovale. 



Rana ovalis, Schneid. Hist. Amph. p. 13 ; Shaw, Zool. iii. p. 3. 

 Bufo surinamensis, Daud. Rain. pi. 33. f. 2, and i?e/Jii. viii. p. 184. 



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



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



Engystoma ovale, Fitz. Neue Classif. Rept. p. 65 ; Dum. ^ Bibr. 



p. 741. 

 Oxyrhynchus bicolor, ( Valenc.) Ouerin, Iconogr. Rept. pi. 27. f. 2. 

 Microps unicolor, Wagl. 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. Herpet. v, p. 23. pi. 6 ; 



Dum. i<f Bibr. p. 743. 

 carolinense et olivaceum, Hallowell,Proc. Ac. Fhilad. 1856, p. 251. 



Talon with one (exceptionally with two) tubercles ; muzzle rathei" 



E 2 



