BATRACHIAANOURA. 37 



little longer than the body and head together. The toes are slender 

 and depressed, bordered by a membranous fold ; their articulations 

 being provided underneath with small tubercles. The sole of the feet 

 is smooth. There are two small metatarsal tubercles. 



The skin is smooth, without asperities, tubercles, or glands of any 

 kind. 



The color is light-yellowish or reddish-brown above. A chestnut- 

 brown vitta extends from the snout over the nostrils, to the anterior 

 rim of the eye. Behind the eye, the vitta is superiorly margined 

 with white, and runs obliquely towards the occiput, hence, diverging 

 towards the sides, terminates about the middle of the trunk. The 

 .legs are barred with blackish-brown. Beneath, the color is uniform 

 reddish-brown ; the posterior part of the thighs and legs assuming 

 a more intense hue. On each side may be seen, proceeding from the 

 belly, a blackish-brown, elongated, and tapering patch, inclined ante- 

 riorly towards the chest. 



Found at Rio de Janeiro, Brazil. 



Plate III, fig. 34, represents Cystignathus parvulus, size of life. 

 Fig. 35, is a side view of the head. 

 Fig. 36, an upper view of the head. 

 Fig. 37, under surface of right hand. 

 Fig. 38, under surface of left foot. 



GENUS PLEURODEMA, TSCH. 



GE> T . CHAR. Vomerine teeth disposed upon two oblong groups, situa- 

 ted between the inner nostrils. Tongue subcircular, slightly emar- 

 ginated, or entire posteriorly. Tympanum indistinct. Toes either 

 entirely free or else provided with a rudimentary membrane at their 

 base or along their edges. Skin pustulous or granular ; sometimes 

 a large lumbar gland on each side. 



STN. Pleurodema, Tscn. Mem. Soc. Sc. nat, Neuch. II, 1838, 84. BELL, Zool. 

 Voy. Beagle. V, 1843. 36. GRD. in Proc. Acad. Nat. Sci. Philad. VI, 1853, 420. 



OBSERV. Contrary to the opinion of Dumeril & Bibron, and in 

 accordance with that of Bell, we adopt the genus Pleurodema of 

 Tschudi, to include such species of the genus Cystignathus, as under- 



10 



