558 



M. G. A. BOULENGER ON THE 



Dimensions. 



[Nov. 16, 



Froai snout to vent 



Lengtli of head 



Breadth of head 



From eye to nostril 



From eye to tip of snout 



Greatest diarueter of orbit 



Interorbital space 



Horizontal diameter of tympanum 

 Vertical diameter of tympanum... 



Length of parotoid 



Breadth of parotoid 



Body 



Fore limb 



Hind limb 



Tibia 



m. 



0-112 



0030 



0040 



0'008 



0013 



0012 



0010 



0-004 



0-0055 



0024 



0013 



0-082 



0-082 



0155 



0046 



m. 



0-122 



0-033 



0-045 



0-OOS 



0014 



00125 



0-012 



00055 



O-OOfio 



0026 



0-015 



0089 



0-079 



0-163 



0050 



c. 



m. 



0041 



0-012 



0-016 



0-003 



0-0055 



0-005 



0-004 



0002 



0-0025 



0008 



00045 



0029 



0-023 



0-048 



0-016 



a. 

 b. 



c? . Loc. ? Brussels Museum. 

 2 . Loc. 1 Brussels Museum. 

 Young. Loc. ? Brussels Museum. 



Description. — This species has generally been confounded with the 

 following one, from which it differs chiefly iu its physiognomy, its 

 small tympanum, its very concave fronto-parietal hones, and its two- 

 rowed subavticular tubercles under the fingers and toes. 



The head resembles tjiat of B. viridis ; but the interorbital space 

 is very concave iu adult specimens, and broad, its breadth being 

 always more than the greatest breadth of the upper eyelid. The 

 nostrils are rather nearer the tip of the snout than to the anterior 

 corners of the eyes ; the space between them equals that between 

 one of them and the lip. The eyes are equally distant from the tip 

 of the snout and from the angles of the jaws. The tympanum is 

 very distinct, subovate ; its greatest diameter, the vertical, is some- 

 what more than half the horizontal diameter of the orbit. The cleft 

 of the mouth extends to the level of the centre of the tympanum. 

 The tongue is generally broader than in the preceding species, its 

 breadth equalling about two thirds of its length in males, three 

 fourths in females. The parotoids are rather large, depressed, 

 elliptic, their inner edges slightly divergent backwards, their front 

 edges nearly in contact with the upper eyelids ; their length equals 

 nearly the 'double of their breadth, or the distance between their 

 anterior edge and the tip of the snout. 



The body is rather more than twice and a half as long as the 

 head, with slight difference between the sexes ; it is shorter in 

 young. 



The fore limb is very stout and as long as the body in males, 

 thinner and much shorter in females. The fingers are moderately 

 elongate, truncated or even slightly swollen at the tips, especially in 



