186 CYSTIGNATHID^. 



Pupil horizontal. Tongue circular, entire and sliglitly free be- 

 hind. Vomerine teeth. Tympanum distinct. Fingers free, first 

 opposite to the others ; toes webbed to the tips ; tips of fingers and 

 toes pointed, or swollen into small disks. Outer metatarsals sepa- 

 rated by web. Omosternum cartilaginous ; sternum a cartilaginous 

 plate. Terminal phalanges simple. 



S, America. 



Synopsis of tJie Species. 



I. Tips of fingers and toes pointed. 



Tibio -tarsal articulation reaching the tip 



of the snout 1. paradoxa, p. 186. 



Tibio-tarsal articulation reaching a good 



deal beyond the tip of the snout .... 2. minuta, p. 187. 



II. Tips of fingers and toes swollen into small disks. 



Tympanum half the size of the eye .... 3. limellwm, p. 187. 

 Tympanum nearly as large as the eye . . 4. mantidactyla, p. 187. 



1. Fseudis paradoxa. 



Pseudis paradoxa, GUnth. Cat. p. 5. 

 Menan, Ins. Sur. t. 71 ; Zinn. Mus. Ad. Prid. p. 49 ; Edwards, 



Phil. Tram. li. p. 653, f. 16, a, h; Seba, 1,78, 15-21. 

 Rana paradoxa, lAnn. Syd. Nat. ; Shaw, Zool. iii. p. 120, pi. 36 ; 



Baud. Rain. p. 67, pis. 22 & 23, and Sept. viii. p. 130 ; Men: Tent. 



p. 176 ; Cuv. It. A. ; Qravenh. Belie, p. 34 ; Oriff. An. Kingd. ix. 



p. 393. 

 Proteus raninus, law. Syn. Sept. p. 36. 



Pseudis paradoxa, WmI. Syst. Amph. p. 203 ; Tschudi, Hair, p, 80. 

 meriansB, Bum. ^ Bibr. p. 330, pi. 86. f. 2. 



Vomerine teeth in two straight series between the choanae. 

 Snout tapering, subaouminate ; interofbital space broader than the 

 upper eyelid ; tympanum three fourths the width of the eye. Fin- 

 gers pointed ; toes pointed, webbed to the tips, fourth little longer 

 than third; subarticular tubercles very small; inner metatarsal 

 tubercle conical ; no outer tubercle. The hind limb being carried 

 forwards along the body, the tibio-tarsal articulation reaches the tip 

 of the snout. Skin smooth. Brownish above, indistinctly spotted 

 with darker ; hinder side of thighs brown-and- white marbled ; under 

 surface of thighs generally longitudinally striped with brown. 



Guianas. 



a. $ . Demerara. Oapt. Sabine [P.]. 



h, c, d, e,f, g, h. Larvse, Demerara. 



i. Larva. Surinam. Sir A. Smith [P.]. 



h. Larva. Surinam. 



l-m, n, o-q. $ & larvae. S. America. 



