REPTILES. 33 



LlMNOCHARIS FUSCUS. Mild. 

 Plate XVI.— Fig. 3. 

 Habitat, Rio Janeiro. 



Description. — Head semi-oval, depressed, as broad as it is long. The muzzle truncated, extending 

 beyond the lips, which it overhangs. Tongue oval, entire, free at the posterior margin. Pala- 

 tine teeth in two parcels on each side ; one consisting of very few at the anterior and inner 

 margin of the posterior nares, the other behind those openings, in the angle formed by the 

 maxillary arch and the orbits. Posterior nares large and oval. Tympanum conspicuous, 

 nearly circular. Skin every where perfectly smooth, without glands or pores. Anterior legs 

 of moderate length and size. The fore-arm rather longer than the upper arm. Fingers of 

 moderate length, wholly detached. Hinder legs little more than one-third longer than body. 

 The toes separate, excepting a slight rudiment of a connecting membrane at their base, which 

 extends, though very narrow, along their sides, the extremity very slightly notched. 



Colour of the upper part rich dark brown. The thighs lighter, obscurely banded with dark 

 brown. Under parts pale blueish grey. The throat dotted with brown. 



DIMENSIONS. 



In. Lin. 



Length of the head and body 1 4 



of the anterior extremities 7 



of the posterior extremities 1 8 



Found in brooks at Rio Janeiro by Mr. Darwin, who states that it is infested 

 with acari ; and I observe, in the specimen under examination, several marks in 

 the skin, from whence these have been taken. 



Genus— CYSTIGNATHUS. Wagler. 



Cystignathus Georgianus. Bibr. 



Plate XVI.— Fig. 4. 



Dentibus palatinis perpaucis, in fasciculis binis approximatis, pone nares posteriores ; 

 lingua integrd, oblongd ; tympano celato ; pedibus posterioribus non pal- 

 niatis. 



Crinia Georgiana, Tschudi Class. Batrach. 

 Cystignathus Georgianus, Bibr. Bept. VIII. p. 416. 



This species, which formed the type of Tschudi's genus Crinia, was sepa- 

 rated by him from Cystignathus on account of the form of the tongue, the non- 



F 



