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



205 



feebly oblique or nearly vertical, concave ; nostril equally distant 

 from the eye and from the end of the snout or a little nearer the 

 latter ; distance between the nostrils greater than the interorbital 

 width, which measures f to J that of the upper eyelid ; tympanum 

 very distinct, § to f the diameter of the eye, 5 to 6 times its dis- 

 tance from the latter. 



Fingers rather slender, with moderately large discs measuring 

 J to \ the diameter of the eye, bearing a groove separating the 

 upper from the lower surface ; first and second fingers equal, third 

 longer than the snout ; subarticular tubercles moderately large, 

 prominent. 



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

 ing far beyond the tip of the snout, the tibia reaching the axil, 

 the heels strongly overlapping when the limbs are folded at right 

 angles to the body ; tibia 5^ to 6 times as long as broad, i|- to if 

 times in length from snout to vent, a little shorter than the fore 

 limb, longer than the foot. Toes with the discs similar to but a 

 little smaller than those of the fingers, entirely webbed ; outer 

 metatarsals separated nearly to the base ; subarticular tubercles 

 moderate ; no tarsal fold ; inner metatarsal tubercle elliptic, \ to 

 I the length of the inner toe ; no outer tubercle. 



Skin smooth ; a moderately broad, feebly prominent glandu- 

 lar dorso-lateral fold from above the tympanum to the hip, its 

 distance from its fellow, on the back, 5 times in length from 

 snout to vent ; a glandular fold from below the eye to the should- 

 er, followed by a strong glandule. 



Bright green above, brownish on the sides of the head and 

 body, below the canthus rostralis and the dorso-lateral fold, and 

 on the limbs ; upper lip white ; limbs with regular dark cross- 

 bands ; hinder side of thighs marbled dark brown and yellow. 

 Lower parts white. 



Males with an external vocal sac in front of the arm ; fore 

 limbs strong, 



Measuremerds. 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 



1-2. Five-finger Mts., Hainan (types). 3. Man Son Mts., Tonkin. 



