30 ' BATRACHIA. 



eye, of about one-third, consequently narrower than the upper lid. 

 The tympanum is subcircular, very conspicuous, situated above the 

 angle of the mouth. Its diameter is equal to the interocular space, that 

 is to say, considerably smaller than the eye. The mouth is deeply cleft. 

 The tongue is cordiform, narrowest anteriorly, and slightly emargi- 

 nated at both extremities, the posterior one of which being free for 

 about one-third of the length of that organ. The inner nostrils are 

 quite large ; irregularly and transversely oblong. The vomerine teeth 

 are placed behind the latter ; the arches which they constitute are 

 almost contiguous and angular, instead of forming an open curve, as 

 in the following species. The openings for the Eustachian tubes are 

 as large as the inner nostrils, and irregular also in their outlines. 



The body is raniform, elongated. The legs are proportionally well 

 developed ; the anterior ones, when brought backwards alongside the 

 body, extend beyond the groins, for the whole length of the fingers : 

 these are subcylindrical and tapering, the first being longer than the 

 second. They are provided under their articulations with small coni- 

 cal tubercles. The palm of the hand is subtuberculous. There are 

 two metacarpal horny disks, the innermost oblong, and situated at the 

 base of the first finger. The hind legs are longer than the body and 

 head together, for the whole length of the feet. A membranous fold 

 may be seen lining the inner edge of the tarsus. There are two meta- 

 tarsal tubercles, the outer one quite small and conical, the other is 

 more elongated, and placed interiorly at the base of the first toe. The 

 toes themselves are slender, tapering to a point, and free, save a rudi- 

 mentary membrane at their base, and an indistinct fold along their 

 edge. The sole of the feet is smooth. Conspicuous tubercles are 

 observed under each of the articulations of the toes. 



The skin is smooth ; there are four longitudinal narrow ridges on 

 each side of the back, exhibiting, however, no roughness about them. 



The ground color of the head and back is greenish-brown ; on the 

 sides and upper part of legs, yellowish-brown. A blackish vitta is ob- 

 served on each side of the snout, along the line of the canthus ros- 

 tralis ; behind the eyes the said vitta widens and passes around the 

 tympanum, hence, tapering towards the shoulder. The margin of 

 the jaws is spotted black and white. A large subtriangular patch 

 upon the eyelid. The tympanum is deep-chestnut, margined with 

 dull-yellow. Series of small black spots may be seen along the back, 

 between the cutaneous ridges, the exterior one of which being whitish, 



