1920.] G. A. BouLENGER : Frogs of the Genus Rana. 



207 



Measurements, in millimetres. 



From snout to vent 

 Head . . 

 Width of head 

 Snout . . 

 Eye 



Interorbital width 

 Tympanum 

 Fore limb 

 First finger 

 Second finger 

 Third finger 

 Fourth finger 

 Hind limb 

 Tibia . . 

 Foot 

 Third toe 

 Fourth toe 

 Fifth toe 



feet. 



I. Darjiling. 2. Darjiling (type). 



Habitat. Darjiling. The types are from an altitude of 3,500 



113. Rana gerbillus. 



Raua gerbilhis, Annand. Rec. hid. Mus. VIII, 1912, p. 10, pi. ii, fig. I. 



Vomerine teeth in two small roundish groups or oblique series 

 between the choanae or on a level with their postrior borders. 



Head as long as broad; snout rounded, feebly projecting 

 beyond the mouth, as long as or a little longer than the eye ; 

 canthus rostralis distinct ; loreal region feebly oblique, concave ; 

 nostril a little nearer the tip of the snout than the eye ; interorbital 

 space as broad as the upper eyelid ; tympanum distinct, i to f 

 the diameter of the eye, i to i^ times its distance from the latter. 



Fingers slender, with large discs, that of the third as large as 

 or rather larger than the tympanum ; first finger shorter than the 

 second, third longer than the snout. 



Hind limb very long and slender, the tibio-tarsal articulation 

 reaching far beyond the tip of the snout ; tibia 6 times as long as 

 broad, \\ to if times in length from snout to vent, longer than the 

 foot. Toes with the discs smaller than those of the fingers, 

 nearly completely webbed ; subarticular tubercles large but not 

 prominent, oval ; no tarsal fold ; a flat, oval inner metatarsal 

 tubercle ; no outer tubercle. 



Back smooth or obscurely granulate, sometimes with large 

 compressed longitudinal tubercles scattered more especially on the 

 sides ; a distinct glandular dorso-lateral fold. Lower parts 

 smooth. 



The young type specimen is described as very dark grey above, 

 obscurely mottled with a paler shade ; lips with pale vertical bars ; 

 sides pale, spotted with dark grey ; limbs with dark cross-bands. 



i .The size of the tympanum is very different on the two sides. 



