552 M. G. A. BOULKNGER ON THE [NoV. 16, 



space is flat and narrow, its breadth equalling about two thirds 

 of the greatest breadth of the upper eyeUd. The tympanum is 

 always very distinct in adult specimens ; its greatest diameter equals 

 about h;ilf that of the eye. The cleft of the mouth extends to the 

 level of the front edge of the tympanum, or a little beyond. The 

 tongue does not differ from that of B. calamita. The parotoids are 

 large, broad, depressed, oval, subtriangnlar or kidney-shaped, be- 

 ginning at a short distance behind the upper eyelids, their inner 

 edges slightly convergent backwards; they are larger in females than iu 

 males; if directed forwards, their extremity would reach the nostrils 

 in the former, scarcely beyond the eyes in the latter. 



The body is about twice and a half as long as the head in females, 

 somewhat less iu males and young. 



The fore limb is always shorter than the bodj'^ ; it is stronger 

 in males. The fingers do not differ in shape and proportions 

 from those of B. calamita ; hut the subarticular tubercles are single- 

 rowed. 



The hind limb is not quite so short as that of B. calamita, nor so 

 long as that oi B. viridis ; if it be carried forwards along the body the 

 metatarsal tubercles reach the middle of the eye in males, the tympa- 

 num in females and young. The tibia is a little longer than the 

 head, and provided on its upperside with a large gland like that of 

 B. calamita. The cutaneous tarsal fold is not so distinct as is gene- 

 rally the case in B. calamita. The inner metatarsal tubercle is strong, 

 oval, and very prominent ; the outer one is rounded and much 

 smaller than that of B. calamita. The toes are a little longer than 

 those of that species, webbed at the base, and provided with simple 

 subarticular tubercles. 



The warts upon the body do not differ from those of B. calamita. 



The upper surfaces are of a light olive tint, with large, insuliform, 

 chestnut-brown or blackish, more or less confluent spots, giving the 

 animal a very beautiful appearance ; these spots respect the vertebral 

 line, where the light ground-colour appears as a rather broad dorsal 

 stripe. This is especially the case in females, whilst in males the 

 spots are generally much less accentuated, and the vertebral stripe 

 consequently rather inconspicuous. The tips of the fingers, and 

 sometimes of the toes, are blackish brown. The lower surfaces are 

 dirty white ; very seldom a few small blackish spots may be seen 

 wide apart on the belly. 



Such is the coloration of specimens preserved in spirit. It 

 difl^ers very little from that of the living animal, as I know from 

 two water-colours which M. Collin de Plancy had executed by a 

 Chinese artist in Pekin, one of which has been kindly given to me 

 by M. Lataste. These paintings represent the fingers and toes flesh- 

 coloured, and the iris greenish yellow abundantly vermiculated with 

 black, except a narrow ring round the pupil. 



The males (which do not seem to reach the size of the females) 

 are provided with a subgular vocal sac, which is much less developed 

 than that of £. calamita ; the apertures inside the mouth are, as in that 

 species, either on the right side or on the left, or they may be double. 



