64 BATRACHIA. 



large. The vomerine teeth constitute two quite elongated groups, 

 situated obliquely behind the' inner nostrils; their posterior extremi- 

 ties approximate, though not contiguous, whilst anteriorly they would 

 pass along the outer margin of the inner nostrils if extended thither. 



The body is comparatively short, not quite the two-thirds of the 

 length, the head included. The limbs are slender ; the fingers and 

 toes slender also, and terminated by comparatively small disks. The 

 anterior legs,, when brought backwards alongside with the body, do not 

 extend beyond the groins. The articulations of the fingers are provided 

 beneath wdth quite conspicuous tubercles. There are two metacarpal 

 tubercles, one is elongated, situated at the base of the first finger, the 

 other circular, in a medial line with the palm of the hand, which is sub- 

 tuberculous. The hind legs are proportionally long, for, when brought 

 forwards, half of the tarsus projects beyond the snout. The toes are 

 subdepressed like the fingers, and provided with tubercles under their 

 articulations. The sole of the feet is smooth. A conspicuous meta- 

 tarsal tubercle exists at the base of the first toe, and a very indistinct 

 one outside of it. 



The color, as preserved in alcohol, is uniform blackish-brown, 

 lighter beneath. 



Collected at Rio de Janeiro, Brazil. 



Plate III, fig. 24, represents Hijlodes jyarvus^ size of life. 



Fig. 25, is a side view of the head. 



Fig. 26, an upper view of the same region. 



Fig. 27, under surface of the left hand. 



Fig. 28, under surface of the left foot. 



Genus ELOSIA, Tsch. 



Gen. Chae. — Snout obliquely truncated. Vomerine teeth disposed 

 upon two groups, situated behind the inner nostrils. Tongue large, 

 subcircular or subelliptical, posteriorly entire, and adhering by most 

 of its under surface. Tympanum distinct. Eustachian tubes small. 

 Fingers free. Toes webbed at their base. Subdigital disks mode- 

 rate. Abdomen smooth. 



Syn.— ^fosm, TsoH. Mem. Soc. Sci. nat. Neuch. II, 1838, 77.— DuM. & Bibr 

 Erp. gen. VIII, 1841, 632. 



