226 CYSTIGNATHID^, 



greenish above, with large insnliform, light-edged olive spots ; some- 

 times vinaceous red lines between the spots. Male with a subgular 

 vocal sac. 



E. S. America. 



a-h. (S $ . Buenos Ayres. Ch. Darwin, Esq. [P.]. (Types.) 



c. $ . Buenos Ayres. E. W. White, Esq. [P.]. 



d. 5 . Parana. 



8. Ceratophrys americana. 



Pyxicephalus americanus, part., Giinth. Cat. p. 24. 

 Pyxicephakis americanus, Dum. ^- Bibr. p. 446 ; Bell, Zool. Beagle, 

 Hept. p. 40, pi. 18. f. 2; nOrhigny, Amer. merid. v. p. 10, pi. 14. 

 f. 1-4 ; Espada, ViaJ. Pacif., VeHebr. p. 20. 



Yomeriue teeth in two straight groups a little behind the choanse. 

 Head moderate, not bony ; nostril equally distant from the eye and 

 the tip of the snout ; eyelid normal ; iuterorbital space flat, narrower 

 than the ujjper eyelid ; tympanum hiddeii. First finger longer than 

 second ; toes one-third webbed ; subarticular tubercles well deve- 

 loped : inner metatarsal tubercle very large, shovel-shaped, black- 

 edged ; a short tarsal fold. The hind limb being carried forwards 

 along the body, the metatarsal tubercle does not reach the eye. Skin 

 tuberclar above and beneath ; a few elongated glands on the back. 

 Olive above, with large, insuliform, light-edged spots ; a light ver- 

 tebral stripe. 



E. S. America. 



c. 2 . \. Montevideo. 



b. Yg. "■ Montevideo. Charles Darwin, Esq. [P.]. 



c-d. J $ . ' Buenos Ap-es. E. W. White, Esq. [C.J. 



9. Ceratophrys cultripes. 



Pyxicephalus americanus, part., Giinth. Cat. p. 24. 

 Odontophrynus cultripes, Heinh. <^' Luth. Vidensk. Meddel. 1861, 



p. 159, pi. iii. f. 1. 

 Pyxicephalus cultripes, Co^ye, Proc. Ac. Philad. 18G3, p. 51. 



Vomerine teeth in two slightly oblique series between the 

 choanse. Head moderate, not bony ; nostril a little nearer the 

 eye than the tip of the snout ; upper eyelid simple ; iuterorbital 

 space scarcely concave, a little narrower than the upper eyelid ; 

 tympanum hidden. First finger longer than second ; toes one-third 

 webbed ; subarticular tubercles well developed ; inner metatarsal 

 tubercle very large, shovel-shaped, brown-edged; a very distinct 

 tarsal fold. The hind limb being carried forwards along the body, 

 the metatarsal tubercle does not reach the eye. Skin tubercular 

 above and beneath ; two or three parotoid-likc glands on each side of 

 the neck and front part of the back ; a large jjarotoid-like gland on 



