186 CYSTIGNATHIDZ. 
Pupil horizontal. Tongue circular, entire and slightly 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 the Species. 
I. Tips of fingers and toes pointed. 
Tibio-tarsal articulation reaching the tip 
BigUMO MOUS. Seca padgne geo aye ene eee 1. paradoxa, p. 186. 
Tibio-tarsal articulation reaching a good 
deal beyond the tip of the snout .... 2. minuta, p. 187. 
Il. Tips of fingers and toes swollen into small disks. 
Tympanum half the size of the eye .... 3. limellum, p. 187. 
Tympanum nearly as large as the eye .. 4. mantidactyla, p. 187. 
1. Pseudis paradoxa. 
Pseudis paradoxa, Giinth. Cat. p.5. 
Merian, Ins. Sur. t. 71; Linn. Mus. Ad. Frid. p. 49; Edwards, 
Phil. Trans. li. p. 653, f. 15, a, b; Seba, 1. 78, 15-21. 
Rana paradoxa, Linn. Syst. Nat.; Shaw, Zool. iii. p. 120, pl. 36 ; 
Daud. Rain. p. 67, pls. 22 & 23, and Rept. viii. p. 180; Mery. Tent. 
p- 176; Cuv. R. A.; Gravenh. Delic. p. 34; Griff. An. Kingd. ix. 
pb. 898. 
Sane raninus, Law". Syn. Rept. p. 30. 
Pseudis paradoxa, Wagl. Syst. Amph. p. 203; Tschudi, Batr, p. 80. 
meriane, Dum. § Bibr. p. 830, pl. 86. f. 2. 
Vomerine teeth in two straight series between the choane. 
Snout tapering, subacuminate ; interorbital 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 lhmb 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, 
Bin2 Demerara. Capt. Sabine [P. ]. 
b, c, d, e, f, g, h. Larve. Demerara. 
2. Larva. Surinam. Sir A. Smith [P.]. 
k. Larva. Surinam. 5 
l-m, n, o-q. 2 & larvee. S. America. 
