84 REPTILIA. 



Rhinellus, Fitzing. — Oxyrynchus, Spix, 



Has a muzzle pointed anteriorly.(l) We should approximate to 

 it the 



Otilophis, Cuv. 



Where the muzzle is also angular, and where there is a crest on 

 each side of the head which extends over the parotid. The Crapaud 

 perle, [Ran. margaritifera, Gm.,) Daud. XXXIII, is its type. 



Breviceps, Merr. — Engystoma, Fitzing., partim. 



Toads without a visible tympanum or parotid, in which the body is 

 oval, head and mouth very small, and the feet but slightly palmated.(2) 



A more essential difference is that which has separated the Pipae 

 of Laurenti from all the great genus Rana. 



PiPA, Laur. 



This subdivision is distinguished by a horizontally flattened bodyj 

 a broad and triangular headj by the absence of a tongue^ by a tym- 

 panum concealed under the skin; by small eyes placed near the edge 

 of the upper jaw; by anterior toes, each of which is divided at the 

 extremity into four small points; and finally by the enormous larynx 

 of the male, formed like a triangular osseous box, inside of which 

 are two movable bones, which can be made to close the entrance to 

 the bronchi3e.(3) 



The species formerly known, Bana pipa, L.; Seb. I, Ixxvii; 

 Daud., xxxi, xxxii, is found at Cayenne and Surinam in dark 

 places about the houses. Its back is granulated, with three lon- 

 gitudinal ranges of larger granules. When the ova are expel- 



(1) Bufo proboscideus, Spix, XXI, 4; — the neighbouring' species figured on the 

 same plate, B. semilineatus, B. granulosus, ^. acuiiVos^m, and those of pi. xiv, 

 naricus and nasutus, connect this subgenus too closely with the common Toads to 

 be easily retained. 



(2) Engystoma dorsatum. Nob., or Bufo gibbosus, Auct., Seb., II, xxxvii. No. 3, 

 Daud. XXIX, 2; — Eng. marmoratuni; — Eng. granosum, Cuv., new species, one 

 from India, the other from the Cape. The mouth of the Eng. surinamense, Daud., 

 XXXIII, 2, is already larger, as well as in the Bufo globulosus and albifrons, 

 Spix, XIX. N. B. The Eng. ovalis, Fitz. is a Bactylethra,- his Eng. ventricosa, Daud. 

 XXX, 2, is a Bombinator. 



N.B. The Bufo ephippium, Spix, XX, 2, of which Fitzinger makes his genus 

 Brachtcephalus, on account of there being but three toes to all the feet, may be 

 a young specimen badly preserved or incorrectly figured. 



(3) Described by Schneider under the nume of Cista slernalis. 



