1920.] 



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



205 



feebly oblique or nearh^ 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 f that of the upper eyelid ; t3'mpanum 

 very distinct, § to | 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 i 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 5J to 6 times as long as broad, 1^ 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 

 f 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. 



Measurements, in millimetres. 



Prom 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. 



