BATRACHIAANOURA. 43 



eubcircular, free upon its posterior third. Toes elongated and 

 slender. Skin perfectly smooth. Ground color fuliginous, macu- 

 lated above ; unicolor beneath. 



SYN. Cystiynathus peronii, DOM. & BIBR. Erp. gen. VIII, 1841, 409. 

 Wayleria pf.ronii, GRD. in Proc. Acad. Nat. Sci. Philad. VI, 1853, 421. 



DESCR. The unique specimen of this species which we have before 

 us is about an inch long. That it is Cysiignaihus peroni of Duine*- 

 ril & Bibron, we can only infer from their description, which, as far as 

 it goes, applies perfectly to it. It must, however, be remembered that 

 the said description is extremely brief, and hardly sufficient to establish 

 thoroughly its identity. 



The head forms about the third of the entire length, the limbs 

 always excepted. It is a little broader than long, and when viewed 

 from above, subovoid in its outline. Its upper surface is even and 

 smooth, the snout being rather prominent and rounded. The nostrils 

 are small, and nearer the eye than the margin of the upper jaw. The 

 eyes are subelliptical, proportionally large; their longitudinal diameter 

 being greater than the interocular space, and comprised twice in the 

 rostral distance between their anterior rim and the nostrils. The 

 upper lid is smooth above, and its margin sharp, and projecting con- 

 siderably over the eyeball. The tympanum is indistinct, circular, 

 rather small ; its diameter being half that of the eye. It is situated 

 immediately above and posteriorly to the angle of the mouth. The 

 tongue is subcircular, very slightly emarginated posteriorly, and free 

 for about one-third of its length. The inner nostrils are small but 

 conspicuous and circular; the openings of the Eustachian tubes are 

 smaller, though similar in form. The series of vomerine teeth is 

 narrow and long; placed at some distance behind the inner nostrils, 

 and extending almost across the whole width of the roof of the palate. 



The body is elongated, subcylindrical. The anterior legs, when 

 brought backwards alongside with the body, are made to reach the 

 groins with the extremities of the fingers ; the latter are subcylindri- 

 cal, slender, and tapering, and provided beneath with small tubercles. 

 The palm of the hand is smooth. There are two oblong metacarpal 

 tubercles, the one at the base of the first finger being the largest. 1 he 

 first, second, and fourth fingers are almost equal in length. The hind 

 legs are longer than the body and head together, for the whole length 

 of the foot. The toes being slender and subcylindrical, margined in 



