1920.] G. A. BOULENGER : Frogs of (he Genus Rana. 197 



Vomerine teeth in short transverse or oblique series between 

 the choanae or extending beyond the level of their posterior borders, 

 equally distant from each other and from the choanae or a little 

 nearer together. 



Head as long as broad or a little longer than broad, much 

 depressed ; snout rounded or obtusely pointed, scarcely projecting 

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

 canthus rostralis strong ; loreal region feebly oblique and strongly 

 concave ; nostril equally distant from the eye and from the tip of 

 the snout, or a little nearer the latter ; distance between the nos- 

 trils equal to or a little greater than the interorbital width, which 

 is equal to or a little less than that of the upper eyelid ; tympa- 

 num very distinct, J to f the diameter of the eye^ i to 4 times as 

 long as its distance from the latter. 



Fingers rather long and slender, the tips dilated into moder- 

 ately large discs with a groove separating the upper from the 

 lower surface, the discs as long as broad, much smaller than the 

 tympanum {\ to 5 its diameter) ; first finger as long as or longer 

 than the second, third longer than the snout ; subarticular tubercles 

 large, very prominent. 



Hind limb extremely long, slender, the tibio-tarsal articulation 

 reaching far beyond the tip of the snout, the heels strongly over- 

 lapping when the limbs are folded at right angles to the body ; 

 tibia 6 to 7\ times as long as broad, ij to i|^ times in length from 

 snout to vent, as long as or a little longer than the fore limb, 

 much longer than the foot. Toes with discs similar to those of 

 the fingers or a little larger, entirely webbed, the base of the discs 

 of the third and fifth involved in the web ; outer metatarsals 

 separated nearly to the base ; subarticular tubercles moderately 

 large, prominent ; no tarsal fold; inner metatarsal tubercle oval 

 or elliptic, J to J the length of the inner toe ; outer tubercle more 

 or less distinct, rarely absent. 



Skin of upper parts smooth or finely granulate ; a moderately 

 broad, moderately prominent glandular dorso-lateral fold from 

 above the tympanum to the hip, its distance from its fellow, on the 

 back, 4|- to 5^ times in length from snout to vent. Lower parts 

 smooth. 



Pale brown, greyish brown, or reddish brown above, uniform 

 or marbled with darker, dark brown on the sides of the head and 

 sometimes of the body ; sometimes a black streak on the canthus 

 rostralis and along the outer side of the dorso-lateral fold, with a 

 downward process in front of and another behind the tympanum, 

 which is yellowish or reddish brown with a dark brown central 

 spot ; limbs with dark cross-bands, which may be very indistinct ; 

 hinder side of thighs speckled or vermiculate with dark brown, or 

 marbled with dark brown and yellow. Lower parts white, or belly 

 yellow, uniform, or throat and breast spotted or speckled with 

 brown. 



Males with a small external vocal sac on each side of the 



