58 B A T R A C H I A. 



stretched alongside the body, scarcely reach its posterior extremity 

 with the tip of the longest finger ; the hind ones, from their insertion 

 to the base of the metatarsus, equal the body and head in length. The 

 fourth or outer finger is the shortest ; the first is a little shorter than 

 the second, and swollen upon its base. There is a subcircular and 

 flattened metacarpal disk, and small tubercles may also be seen under 

 the digital articulations; the palm of the hand is smooth. The tarsus 

 is provided with a cutaneous ridge along its inner margin. The toes 

 are slightly webbed at their base, and provided laterally with a very 

 diminutive membrane ; the third is longer than the fifth. The sole 

 of the feet is smooth ; there are two metatarsal tubercles, the inner- 

 most minute and conical, the other situated at the base of the first toe, 

 is larger and elongated. The articulations of the toes exhibit a small 

 tubercle beneath. 



The skin is perfectly smooth throughout, without the slightest trace 

 of pustules or asperities. The body, head, and snout are dusky-brown, 

 with dots of a deeper brown and of white, irregularly spread all over, 

 the white dots forming an indistinct series on each side of the abdo- 

 men. On the posterior portion of the back the white spots have a 

 black dot in their centre. An elongated, quadrangular spot of deep- 

 brown on the middle of the upper jaw, obliquely situated under the 

 anterior half of the orbit. A deep-brown vitta on the canthus ros- 

 tralis. A patch of the same color on the tympanum, extending back- 

 wards, tapering towards the shoulder. The inferior surface of the 

 head and belly are yellowish-white, vermiculated with chestnut-brown. 

 The legs and feet are reddish-brown, unicolor beneath, maculated above 

 with deep-brown patches, largest upon the thighs. 



We consider as the male of this species a smaller individual, uni- 

 formly dusky-brown above, indistinctly maculated upon the thighs. 

 The inferior surface of the head and belly is uniform yellowish-white, 

 and the legs beneath light reddish-brown. The tympanum being also 

 proportionally larger. The first finger is provided above with a double 

 series of very small, conical, and horny, black tubercles, the inner series 

 composed of three, the outer series of but two or one only. 



Specimens were collected at Rio de Janeiro, Brazil. 



Plate IV, fig. 23, represents Elosia hufonium, size of life. 

 Fis:. 24, is a side view of the head. 



