246 iiANiD.5:. 



pi. Ivii, figs. 3 &: 4; \. L. Butler, Journ. Nat. Hist. Soc. Bombay, 

 XV, p. 200 (1903) ; Boulen^. Joiini. Fed. Malay States Mus. iii, 

 p. 63 (1908). 



Vomerine teeth in two very small groups just behind the level 

 of the choana3. Head as long as broad; snout t'ounded or sub- 

 acuminate, shorter than the orbit ; cantbus rostralis sharp ; loreal 

 region concave ; nostril equally distant from eye and from end 

 of snout ; interorbital space narrower than the upper eyelid : 

 tympaniun distinct, ^ tlie diameter of the very large eye. Fingers 

 moderate, the tips ddated into large disks, wliicli are larger than 

 the tympanum ; first finger shorter than second ; toes very broadly 

 webbed, the web involving part of the terminal disks, which are 

 smaller than those of the fingers; subarticular tubercles feeble; 

 a small, feebly prominent, oval inner metatarsal tubercle ; no 

 outer metatarsal tubercle. The tibio-tarsal articulation reaches 

 beyond the tip of the snout ; tibia 'j^ to | length of head and body. 

 :Skin smooth or faintly granular ; a feeble interrupted dorso-lateral 

 fold sometimes present. Above pale yellowish green, the head 

 and body very extensively blotched with black, the limbs with 

 black transverse bars ; below, head and body pure white, limbs 

 pale green and grey, hands and feet very dark, and web between 

 the toes black. Iris olive-brown, with a very narrow gold ring 

 round the pupil. 



From snout to vent 70 millim. Males much smaller (45 millim.). 



Tadpole provided with a well-developed ventral sucker extend- 

 ing from the lip to beyond the middle of the abdomen. Beak 

 minutel}^ serrated ; 9 upper series of labial teeth, 4 uninterrupted 

 and 5 interrupted ; 5 lower series, 4 uninterrupted and 1 inter- 

 rupted. Greenish white, mottled with dark green. Total length 

 65 millim. 



Capt. Flower discovered this frog in numerous individuals 

 sitting on the rocks in a swift rocky mountain-stream in the Larut 

 Hills, Perak. Mr. Laidlaw found it extremely common along tlie 

 banks of the rapid jungle-torrents running about the foot of 

 Crunong Inas. The frogs sit on the great boulders strewn along 

 the courses of the streams, and when one approaches them spring 

 boldly into the water, no matter how fiercely it may be pouring 

 down. Soon after being disturbed they will again take up their 

 station on the rock which they had quitted, and in such a position 

 their colouring renders them well-nigh invisible. Mr. liobinson 

 obtained specimens in Pahang, between 500 and 5200 feet, and at 

 Ginting Simpah, near Kuala Lumpur, at an altitude of 1800 feet. 

 The species occurs also in Borneo. 



