1872.] REPTILES AND AMPHIBIANS. 599 



In general habit it resembles much the two species named. All 

 the upper and lateral parts are covered by small warts and tubercles, 

 which on the side of the neck do not form a parotoid. Tympanum 

 distinct, one fourth of the size of the eye. Legs very slender, and 

 comparatively more so in adult examples than in young ones. The 

 fore leg extends beyond the vent when laid backwards, and the heel 

 to the end of the snout when the hind leg is laid forwards. In a 

 young example the heel extends only to the tympanum. The young 

 differs from the old also with regard to the development of the web, 

 length and termination of the toes. In an old example the fingers 

 and toes are very slender, slightly swollen at the tip ; the former are 

 quite free, and the latter connected by a basal membrane only ; 

 whilst in the young the fingers and toes are short, dilated, with the 

 extremity truncated* ; and the former are connected by a short, the 

 latter by a very distinct web. Two flat callosities on the metatarsus. 

 Brown above, marbled with reddish or with black dots ; throat and 

 chest with blackish spots, or entirely black. 



Two examples from Matang ; the measurements are as follows : — 



Adult. Young, 



millinis. millims. 



Total length 54 30 



Fore leg 45 25 



Lower arm 17 7 



First finger 7 2| 



Third finger 13 6 



Hind limb 85 39 



Lower leg 27 12 



Tarsus 17 7£ 



Fourth toe 19 9 



First toe 4 2| 



Hylorana jerboa. (Plate XL. fig. B.) 



Hind limbs extraordinarily long, their length being twice and a 

 half as long as that of the body. Shape of the body similar to that 

 of Hylorana erythrcea ; canthus rostralis sharp, loreal region sub- 

 vertical and grooved ; eye shorter than the snout, but larger than 

 the tympanum. Disks of the fingers and toes moderately developed ; 

 fingers slender ; toes completely webbed, the length of the fourth 

 being three fifths of that of the body. Metatarsus with two small 

 tubercles. Skin of the back finely granular ; a glandular fold along 

 each side of the back. Lower parts smooth. Inner nostrils of 

 moderate width, Eustachian tubes rather larger. Vomerine teeth in 

 two oblique series, converging posteriorly, between the inner nostrils. 

 Upperside of the head and back red, side of the body and head 

 black, upper lip and glandular folds greenish white, legs marbled with 

 brown ; lower side of the foot and tarsus black ; abdomen whitish. 



One specimen from Matang ; its body is 2 inches long. Length 

 of the hind limb 5 inches, distance between vent and heel 2| inches. 



* The typical specimens of Hylaplesia brevipes are evidently young, and show 

 similar peculiarities. 



