24 REPTILES. 



12. PYXICEPHALUS. 



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

 Tongue large, rounded, free and hardly nicked behind. Vomerine 

 teeth in one interrupted series. Eustachian tubes rather small; 

 tjTnpanum 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. 



Pyxicephalus, sp., Tschudi, Batr. p. 83 ; Dum. Sf Bihr. viii. p. 446. 



1. Pyxicephalus americanus. 



Dum. 8f Bibr. p. 446 ; Bell, Zool. of the. Bea<jle, Bept. p. 40. pi. 18. f. 2. 



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



a, b. Adult. Brazil. 



c. Young : bad state. Monte Video. 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 horn 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 ; tympaniim more or less hidden. South America. 



Ceratophrys, Bote, in WiecTs Beitr. p. 569 ; Wagl. Syst. p. 203 ; Cuv. 



Rec/ne Anim. ; Tschudi, Batr. p. 82. 

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

 Hemiphractus, Waffl. I. c. p. 204. 

 Stombus, Oravenh. Isis, 1825, p. 952. 

 Bufo, sp., Rana, sp., mict. jjriar. 



1. Ceratophrys cornuta. 



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



Rana cornuta, L. 3Ius. Ad. Fried, p. 48, and Syst. Nat. i. p. 356 ; 



Donnd. Zool. Beitr. iii. p. 47 ; Sch/teid. Hist. Amph. p. 125 ; Shaw, 



Nat. Misc. pi. 76 ; Tilesius, Blayazin der Gesellsch. Ntrf. Freunde in 



Berlin, 1809, p. 92. t. 3, and Kruse7istern''s Reise, t. 6. 

 Bufo coriiutus, Laur. Syn. p. 25 ; Daub. Quadr. Ocip. p. 603 ; Lacep. 



Quadr. Grip. p. 604 ; Bonnat. Erpet. p. 16 ; Shaw, Zool. iii. p. 162. 



pis. 48, 49. 

 Ceratoplu-ys dorsata, Wied, Abbildy. tab. and Beitrdge, i. p. 577 ; 



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



Dum. ^' Bibr. p. 431. 

 Stombus dorsatus, Gravenh. Delic. p. 49. 

 Ceratophrys varia et clypeata, Cuv. Regnc Anim. 

 cornuta, Schlegel, Abb. t. 10. f. 1, 2. 



