235 



nostril equally distant from eye and end of snout; interor- 

 bital space narrower than the upper eyelid; tympanum distinct, 

 '/, the diameter of the very large eye. Fingers with large 

 disks, which are larger than the tympanum; disks of toes 

 smaller than those of fingers; first finger shorter than second; 

 toes very broadly webbed ; subarticular tubercles feeble ; a 

 small, feebly prominent inner, no outer metatarsal tubercle; 

 the heel reaches the tip of the snout or beyond; tibia 3 /s to 

 2 / 3 length of head and body. 



Skin smooth or faintly granular ; a feeble, interrupted dorso- 

 lateral fold sometimes present. 



Pale yellowish green above, head and body more or less 

 blotched with black; limbs with black transverse bars; white 

 below, the limbs pale green and grey, throat and under sur- 

 faces of thighs sometimes marked with black, hands and feet 

 very dark, web between the toes black. From snout to vent 



cT 45. 9 75 mm. 



Male with external vocal sacs. 



The eggs are unpigmented. 



Tadpole. — A ventral sucking disk extending from the 

 lip to beyond the middle of the abdomen. Jaws minutely 

 serrated, undivided. Series of teeth 5 4 5 / ' 4 '. Length 65 mm. 



Greenish white, mottled with dark green, above; white below. 



Habitat: Borneo. — Malay Peninsula, up to 1600 m. 



2. Staurois guttatus (Gthr.). 



Ixalus guttatus Gunther, Cat. Batr. Sal. Brit. Mus., 1858, p. 76, pi. IV, fig. D. 

 Rana natatrix (part.), Boulenger, Cat. Batr. Sal. Brit. Mus., 1882, p. 71. 

 Ixalus sp. Mocquard, Nouv. Arch. Mus. d'Hist. nat., (3) II, 1890, p. 154, 



pi. XI, figs. 4 — 40 (tadpole). 

 Rana guttata Boulenger, Ann. Mag. Nat. Hist., (6) XIV, 1894, p. 87. 

 Staurois guttatus Boulenger, Ann. Mag. Nat. Hist., (9) I, 1918, p. 374. 



Tongue without papilla; vomerine teeth in two small oblique 

 groups between the choanae. Head longer than broad, mode- 

 rately depressed; snout rounded, prominent, long; canthus 

 rostralis angular; loreal region deeply concave; nostril near to 

 the tip of the snout; interorbital space narrower than the 

 upper eyelid ; tympanum distinct, about ] j 3 to 72 tne width 

 of the eye. Disks of fingers very large, of toes moderate; first 

 finger shorter than second, which is shorter than fourth; fifth 

 toe longer than third; toes very broadly webbed; subarticular 



