ORDER BATRACHIA. 395 



Ceratophrts, Boie, 



Are frogs with a large head, skin grained altogether, 

 or in part, and each eyelid has a membranous pro- 

 minence like a horn.* 



There are some whose tympanum is concealed 

 under the skin.t 



They all come from South America. The South 

 of Africa produces batracians, similar to the frogs 

 in their teeth, their smooth skin, pointed toes, the 

 hinder ones widely palmated, and the three internal 

 ones having their extremity enveloped in a conical 

 claw of a black and corneous substance. Their head 

 is small and mouth moderate. Their tongue, at- 

 tached to the bottom of the throat, is oblong, fleshy, 

 and very large. Their tympanum is not visible. 

 These numerous characters have determined us to 



i?. Gigas, Spix, I ; R. Pachi/pus, id. II. ; R. Coriacea, id. V. 2 j R. Silula- 

 trix, Pr. Max. liv. j R. Maculata, Daud. xvii. 2; R. Rubella, ib. 1 ; R. 

 Typhonia, ib. 4, which is not, as Merrem believed, the Virginica of Gm. ; 

 R. Punctata, ib. xvi. 1 ; R. Mystacea, Spix, III. 2, 3 ; R. Miliaris, et R. 

 Pygmcsa, id, VI. ; R. LabyrintMca, id. VII. 



* Ceratrophis varius, B. or Rana Cornuta, Seb. I. Ixxii. 1,2; Tiles, Mag. 

 de Beri, 1809, deuxieme Irim. pi. iii. ; and Voy. de Kreusentz, pi. vi., or 

 Ceratophris Dorsata, Pr. Max. deuxieme liv. ; Cerat Spixii, Nob. j or R. 

 Megastoma, Spix, IV. 1 j Ran. Scutata, ib. 2 ; Cerat Daudini, Nob. Daud. 

 xxxviii. ; Cerat Elipeata, Nob. 



-j- Ceratojihris Granosa, Nob. It is of the horned frogs, with concealed 

 tympannm, that Gravenhorst has made his genus Stombus, but they have 

 teeth like the others, and should not be approximated to the toads, as 

 Fitzinqer has done. 



