226 CTSTIGNATHIDJ3. 



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

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

 vocal sac. 



E. S. America. 



a-b. S 2 • Buenos Ayres. Ch. Darwin, Esq. [P.]. (Types.) 



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



d. 2 • Parana. 



8. Ceratophrys americana. 



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

 Pyxicephaliis americanus, Ihim. ^- Bibr. p. 446 ; Bell, Zool. Beagle, 

 Efipt. p. 40, pi. 18. f. 2; D'Orbkpiy, Amer. merid. v. p. 10, pi. 14. 

 f. 1-4 ; Espada, Viuj. Pad/., Vertebr. p. 20. 



Vomerine 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 ; interorbital space flat, narrower 

 than the upper eyelid ; tympanum hidden. 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. 



a. 5 . Monte-\-ideo. 



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

 c-d. S 2- Buenos AjTes. E. W. White, Esq. [C.]. 



9. Ceratophrys ctiltripes. 



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

 Odontophrynus cultiipes, Heinh. ^- Lutk. Vidensk. Meddel. 1861, 



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

 Pyxicephalus cultripes. Cope, Proc. Ac. Philad. 1863, p. 51. 



Yomerino teeth in two slightly oblique series between the 

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

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

 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-like glands on each side of 

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



