GO DR. J. RUUX OX THE TOADS [Jan. 16, 



This is the largest species of tlie genus. The diagnosis given 

 by Boulengev in 1891 was drawn up from a male specimen from 

 Mt. Dulit, Borneo. Since then tlie collection of the British 

 Museum has been increased by several specimens, especially 

 females, which I have had the privilege to study. As is often 

 the case with Bafo, in this species the female individuals are 

 notably larger than the males. The distinctive charactexs 

 indicated by Boulenger are genei'ally veiy well mai'ked in tlie 

 female. The head is broader in comparison with the length. 

 The canthus rostralis is well marked. The loreal region is 

 nearly vertical and shows a slight depression in the upper part. 

 The interorbital space, twice as bi'oad as the upper eyelid, is very 

 distinctly concave, as well as the part of the head situated near 

 the parotoids. The tympanum is very distinct ; it is suboval, 

 vertically elongated, and half as long as the eye. The parotoids 

 are well marked, pyriform, and begin immediately behind the eyes. 



As to the limbs, we ha,ve notice<l individual variations in the 

 length, especially in the hind limbs. The fore limb is relatively 

 long : the fingers, webbed only at the base, are bordered by tlie 

 membrane, and the distal part is subtriangularly enlarged ; this 

 peculiarity is more appreciable in the fingers than in the toes. 

 The hind limbs of most of the individuals observed are longer 

 than in the type specimen. The hind limb being carried forward 

 along the body, the tibio-tarsal articulation reaches sometimes 

 the tympanum, sometimes the eye. The toes are generally short, 

 entirely webbed, except the three distal phalanges of the fourth 

 toe, which are free. The subarticular tubercles are very well 

 developed, as well as the two metatarsal tubercles. The outer 

 tubercle is twice as large as the inner. I have noticed the 

 presence of a very distinct tai-sal fold. 



The coloration of the individuals is worthy of detailed descrip- 

 tion owing to the marked diffeiences between males and females. 



The type specimen, a male, figured by Boulenger, is uniformly 

 bi'own with some indistinct spots on the limbs ; the throat is 

 black. Two other male specimens show the same coloi'ation, but 

 two male specimens from Lawas, Brunei, are somewhat difi'ei-ent. 

 The body shows, besides the dark brown, some light brown 

 markings, which foi-m indistinct coarse vermiculations. The limbs 

 are yellowish brown, and present also lighter and darker j)arts 

 more or less distributed in ti'ansverse bands. 



The females labelled ''Saiuwak," one of which is figured on 

 PI. II. fig. 1, are distinctly bicolor (yellow and black). The gi'ound 

 is black with small vermiculations or round yellow spots (in 

 the latter case especially on the sides of the body). The head, 

 the back, and the limbs show also these vermiculations. The 

 spots are a little bi"oader on the anteiior part and on the sides of 

 the head. The lower part of the body and of the limbs is 

 generally dirty grey or uniform yellowish. The border of the 

 lower lip often shows yellow spots. The inferior part of the feet 

 is brown. The females have ffenei'allv smaller and less numeious 



