28 REPTILES. 



V. Large specimen : skin. South America. From Mr, Stevens's 

 Collection. 



IV. Young : not good state. South America. 



X. Adult : skeleton. Brazil. 



y. Adult : female. South America. From a specimen of the Old 

 Collection. 



z. Large specimen: skeleton. Brazil. From M. Braconier's Col- 

 lection. 



2. Cystignathus caliginosus. 



Leptodactylus caliginosus, GiranI, Proc. Ac. Nat. 8c. Philad. 1853, 

 p. 422. 



Toes fringed on each side ; metatarsus with two tubercles ; tym- 

 panum distinct ; vomerine teeth in two slightly arched series behind 

 the inner nostrils ; skin smooth, with a few scattered flat small 

 warts. Above brown with some obsolete darker spots ; on the occiput 

 a large angular dark blotch. 



a-c. Adult male and female. South America. From the Mus. 



Guilding as Rana gregarla. 

 d-g. Adult and young. South America. Mus. Guilding. 



3. Cystignathus fuscus. 



Rana fusca, Schneid. Hist. Amph. p. 130. 



typlionia, Dcmd. Rain. p. 55. pi. 56. f. 3, 4. 



virginica, Merr. (not Luur.^ p. 177. 



Cystignathus typhonius, Dum. Sf Bihr. p. 402. 



Toes not fringed; tympanum distinct; vomerine teeth in two 

 arches, each very convex. 



a. Adult. Pemambuco. Presented by J. P. G. Smith, Esq. 

 6. Adidt: stuff'ed. Antigua. 



c. Adult : stuffed. South America. From the Haslar Collection. 



d. Large specimen : stuffed. South America. From Mr. Argent's 



Collection. 



e. Adult : skin. South America. 



/. Half-grown. South America. From Mr. MacGiUivray's Collection. 



4. Cystignathus gracilis. 



Cystignathus gracilis. Dam. S,- Bibr. p. 406 ; D' Orbigny, Voy. Amer. 

 Merid. t. 13. f. 5-7. 



Tj'mpanum distinct ; vomerine teeth in a long, narrow cross series, 

 scarcely interrupted in the middle, and placed beliind the internal 

 nostiils ; each part slightly convex. Snout conical, pointed ; upper 

 jaw produced far beyond the lower. A white dorsal band. 



u-c. Adult males. Para. Presented by R. Graham, Esq. 

 d. Adult female. St. Marthe. 



