72 



BATRACHIA. 



gated elliptical, free upon the third of its length, entire or emarginated. 

 Eustachian tubes small. Fingers and toes depressed and tapering, 

 the former with a rudimentary basal membrane, the latter, semi- 

 palmated. A membranous projection of the snout. Males provided 

 with a subgular vocal bladder. 



SwRhinoderma, DCM. & BIBR. Erp. gen. VIII, 1841, 657. BELL, Zool. Voy. 

 Beagle, V, 1843, 47. 



OBSERV. This genus was instituted for a small species, collected in 

 Chile, by Charles Darwin, during the voyage of H. M. Ship Beagle, 

 under Captain Fitzroy. It is a fact of very great interest to find another 

 species of the same genus on the Atlantic coast of South America, one 

 specimen of which having been collected at Rio de Janeiro by the 

 United States Exploring Expedition. 



RHINODEKMA SIGNIFERA, Grd. 



CAR. SPEC. Plantarum digitis elongatis, a basi palmatis. Tuberculis 

 sub digitorum articulis. Colore fusco rubescente, olio punctato. Cru- 

 ribus posterioribus nigro fasciatis. Post occiput macula alba, elon- 

 gata. Ocella lumbali elliptica, leucoplicea. Abdomine maculato. 



SPEC. CHAR. Toes elongated, webbed upon their base. Tubercles 

 under the articulations of fingers and toes. Color above, reddish, 

 dotted with white. Hind legs barred with black. An elongated, 

 white, post-occipital spot. An elliptical, greyish, lumbar ocella. 

 Abdomen maculated. 



SYN. Rliinoderma siijnifera, GRD. in Proc. Acad. Nat Sci. Philad. VI, 1853, 424. 



OBSERV. The unique specimen of this species, preserved in the 

 collections of the United States Exploring Expedition, being in a 

 rather precarious state of preservation, the following description must 

 necessarily remain incomplete, much to our regret. 



DESCR. The general dimensions are about the -same as in R. dar- 

 wini, the head being comprised about twice in the length of the trunk. 

 The head, itself, is conical, almost as long as broad, slightly convex 



