BATRACHIA ANOURA. 



A rudimentary membrane may be observed at their base, as also an 

 inconspicuous fold along their margins. 



The color is uniform reddish-brown, lighter beneath than above, 

 with a light line along the middle region of the back and thighs. 



This species was collected about Rio de Janeiro, Brazil, along with 

 the preceding species. 



Genus CYSTIGNATHUS, Wagl. 



Gen. Char. — Vomerine teeth disposed upon a transverse or oblique 

 row, more or less interrupted in the middle, and situated between 

 the inner nostrils or behind them. Tongue circular, subcircular, or 

 subcordiform ; posteriorly entire and attached by its whole surface, 

 or slightly free behind. Tympanum not always distinct. Toes 

 moderate, bordered by a membranous fold, or inconspicuously 

 webbed at their base. 



Syn. — C^sti(/nat7ius, Wagl. Nat. Syst. Amph. 1830, 202.— Grd. in Proc. Acad. 

 Nat. Sci. Philad. VI, 1853, 420. 



Observ. — Gystignathusmaa^oglossus, DuM. & Bibr., from Montevideo; 

 G. gracilis, DuM. & Bibr., from the same locality, and G. roseus, DuM. 

 & Bibr., from Chile, will remain in the present genus. 



1. Cystignathus nebulosus, Grd. 



(Plate III, figs. 19-23.) 



Car. spec. — Deniibus vomerinis in duos acervos elongatos, oblique inter 

 interior es nares, dispositis. Tympano inconspicuo. Plantarum digi- 

 tis depressis, et plicaturd membixmed margiiiatis. Duo tiibercuU in 

 metatarso ; in tarso verb, plicatiLra membranea. Glandulis Imnbahs 

 mdlis. Gute minute granulata. Supra pallide fusco, albis purw- 

 tidis consperso, colore rufulo obscurato. Macula subtriangulari nigro- 

 fusca in occipite sita, atque post ocidis vitta ejusdem coloris. Poste- 

 rioribus cruribus rubro-fusco fasciatis. Infra unicolori. 



Spec. Char. — Vomerine teeth disposed upon two elongated groups, 

 obliquely situated between the inner nostrils. Tympanum incon- 

 spicuous. Toes depressed, margined by a membranous fold. Two 



