24 REPTILES. 



12. PYXICEPHALUS. 



Head large and thick, muzzle very short, extremities rather short. 

 Tongiie large, roiinded, free and hardly nicked behind. Vomerine 

 teeth in one interrupted series. Eustachian tubes rather small; 

 tympanum hidden. Neck with paratoid-hke glands. Fingers free ; 

 toes half- webbed ; a flat, sharp-edged spur at the metatarsus. Sacral 

 vertebra not dilated. Tropical America. 



Pyxieephahis, sp., Tsrkudi, Batr. p. 83 ; l)um. S)- Bihr. viii. p. 446. 



1. Pyxicephalus americanus. 



Dum. i^-Bibr. p. 446 ; Bell, Zool. of the Becujlv, Eept. p. 40. pi. 18. f. 2. 



On each side of the neck three large paratoid-like glands. 



rt, b. Adult. Brazil. 



c. Young : bad state. Montevideo. Presented by Charles Darwin, 

 Esq. 



13. CERATOPHRYS. 



Body stout, head very large, extremities short; cleft of mouth 

 very large ; edge of upper eyelid more or less produced into a point, 

 so as to form a long hom or only a triangle. Skin with tubercles or 

 cutaneous folds. Fingers free ; toes more or less webbed ; first 

 cuneiform bone with a flat, oblong, rather sharp-edged tubercle. 

 Tongue heart-shaped ; palatine teeth in two groups ; eustachian 

 tubes moderate ; tjTnpanum more or less hidden. South America. 



Ceratophrys, Bote, in WiecFs Beitr. p. 569 ; Wagl. Sijst. p. 203 ; Cuv. 



Regne Atmn. ; Tschudi, Batr. p. 82. 

 Phrjnoceros, (Bibr.) Tschudi, I. c. 

 Hemiphractus, Wogl I c. p. 204. 

 Stombus, Gravenh. Isis, 1825, p. 952. 

 Bufi), sp., Rana, sp., mict. prior. 



1 . Ceratophrys cornuta. 



Seba, i. 72. 1, 2 ; Klein, Quadr. Disjms. p. 120. 



Rana conuita, L. Mus. Ad. Fried, p. 48, and St/st. Nat. i. p. 356 ; 



Donnd. Zool. Beitr. iii. p. 47 ; ScJincid. Hist. Amph. p. 125 ; Shaw, 



Nat. Misc. pi. 76 ; Tilesius, Magazin drr Gesrllsch. Ntrf. Freunde in 



Berlin, 1809, p. 92. t. 3, and Kru^ensfern's lieise, t. 6. 

 Bufo cornutus, Laiir. Syn. p. 25 ; Daub. Quadr. Ovip. p. 603 ; Lacep. 



Quadr. Orip. p. 604 ; Bonnat. Erpet. p. 16 ; Shuiv, Zoul. iii. p. 162. 



pis. 48, 49. _ 



Ceratophiys dorsata, Wied, Abbildg. tab. and Beitriige, i. p. 577 ; 



Wagl. icon. t. 22. f. 1, 2, and Syst. Amph. p. 204 ; Tschudi, I. c. ; 



Dum. ^ Bibr. p. 431. 

 Stombus dorsatiis, Gravenh. Delic. p. 49. 

 Ceratophrys varia et clypeata, Cut: Reqne Aititn. 

 comuta, Sehlegel, 'Abb. t. 10. f. 1, 2. 



