1920.] G. A. BOULENGER : Frogs of the Genus Rana. 115 



beyond the mouth, as long as or slightly longer than the eye ; 

 canthus rostralis obtuse ; loreal region oblique, concave ; nostril 

 equidistant from the eye and from the tip of the snout ; distance 

 between the nostrils equal to or greater than the interorbital 

 width, which is equal to or less than that of the upper eyelid ; 

 tympanum very distinct, -g- to f the diameter of the eye, 2 to 4 

 times its distance from the latter. 



Fingers moderately long, sometimes with more or less feeble 

 dermal border, the tips dilated into rather large discs, which are 

 a little broader than long and with a groove in front, separating the 

 upper from the lower surface ; first finger as long as or a little 

 longer than the second, third as long as or a little longer than the 

 snout ; subarticular tubercles large and very prominent. 



Hind limb long ; the tibio-tarsal articulation reaches the tip 

 of the snout or beyond, rarely only the anterior border of the eye, 

 the heels strongly overlap when the limbs are folded at right 

 angles to the body; tibia 4 to 4I times as long as broad, if to 2 

 times in length from snout to vent, as long as or a little shorter 

 than the fore limb, a little longer than the foot. Toes rather 

 long, depressed, and dilated at the end like the fingers, f webbed, 

 3 phalanges of fourth free, the web reaching the discs of the third 

 and fifth and penetrating |: to -I between the outer metatarsals ; 

 subarticular tubercles moderate or rather small, prominent ; no 

 tarsal fold ; inner metatarsal tubercle oval or elliptic, feebly pro- 

 minent, I to \ the length of the inner toe ; no outer tubercle. 



Skin smooth or finely granulate above, with small elongate 

 warts or short grandular longitudinal folds ; a strong grandular 

 fold from the eye to the shoulder. Lower parts smooth or feebly 

 granulate on the posterior part of the belly ; a discoidal ventral 

 fold sometimes present. 



Brown above, with rather indistinct darker spots, rarely uni- 

 form pinkish ; a light vertebral band sometimes present ; a more 

 or less distinct dark cross-bar between the eyes ; a black streak 

 on the canthus rostralis and a dark brown or black temporal spot, 

 the tympanum sometimes reddish ; limbs with more or less dis- 

 tinct dark cross-bars. Lower parts uniform white, the throat 

 rarely brown or with brown spots. 



Males without vocal sacs, with an enlarged pad on the inner 

 side of the first finger. 



Nasal bones large and in contact with each other and with 

 the frontoparietals ; upper surface of ethmoid covered. Terminal 

 phalanges T-shaped or Y-shaped. 



Tadpole remarkable for its long tail, 3 times the length of the 

 body, with mere rudiments of crests. Beak black and very narrow, 

 the upper mandible A-shaped, the lower U-shaped ; upper lip 

 divided in the middle, with 4 series of teeth, the outer marginal, 

 with 2 or 3 large papillae on the side ; lower lip edged with papillae, 

 with 4 series of teeth, the two outer of which are long and unin- 

 terrupted. 



[Capt. R. B. Seymour Sewell, I.M.S., has recently found the 



