1920.] G. A. Boulenger : Frogs of the Genus Rana. 109 



are supported by thick fleshy ridges. But for the shape of the 

 beak, the mouth-structure of this tadpole is very suggestive of 

 that of the European Pelobates. 



Since the above was written, Dr. Annandale has submitted to 

 me two specimens of a toad ' from vSrinagar, Kashmir, sent to him 

 by Mr. F. J. M. Mitchell as representing the adult of the tadpole 

 assigned by him to Rana pleskii. I have no doubt this suggestion 

 is correct, and as the toads belong to Aelurophryne mammata, 

 Gthr., the resemblance of the tadpole to that of Pelobates is 

 accounted for. 



Subgenus Discodeles. 



Bouleng-., Ann. and Mag. N.H. (9) I, 1918, p. 238. 



Tips of toes, and usually of fingers, dilated into discs, the 

 upper surface of which is separated from the lower by a crescentic 

 or horseshoe-shaped groove ; web not penetrating or not penetrat- 

 ing far between the outer metatarsals. Vomerine teeth in trans- 

 verse or oblique series behind the choanae or on a level with the 

 posterior borders of the latter. Tongue with a large, retractile 

 papilla in the middle. Glandular dorso-lateral fold, if present, not 

 confluent with the temporal. Nasal bones large, in contact with 

 each other and with the frontoparietals. Omosternal style forked 

 at the base. 



Connected with Rana, s. str., through R. grunniens. The 

 genera Cornufer and Platymantis are evidently derived from this 

 group.* 



Synopsis of the Species. 



I . Discs of toes longer than broad ; first finger at least as long as second ; toes f to 



entirely webbed ; lingual papilla obtuse ; terminal phalanges feebly expanded 

 at the end. 



Vomerine teeth not extending outwards beyond vertical 

 of inner edges of choanae ; tympanum about \ dia- 

 meter of eye ; fingers without discs ; tibio-tarsal arti- 

 culation reaching temple ; tibia 2^ to 2| times as long 

 as broad ; upper parts very warty, with an interrupted 

 glandular dorso-lateral fold ; belly granulate ... R. bt/foniformis, B\gr. 



Vomerine teeth not extending outwards beyond verti- 

 cal of inner edges of choanae ; tympanum f to i 

 diameter of eye ; fingers without discs ; tibio-tarsal 

 articulation reaching eye ; tibia 3 to 3^ times as long 

 as broad ; upper parts smooth or warty ; belly feebly 

 granulate ; male with internal vocal sacs ... R. opistliodon, BIgr. 



Vomerine teeth extending outwards beyond vertical 

 of inner edges of choanae ; tympanum \ to \ dia- 

 meter of eye ; tips of fingers dilated into distinct 

 discs ; tibio-tarsal articulation reaching eye or tip of 

 snout ; tibia 3 to 3^ times as long as broad ; skin 

 smooth or feebly warty above, with or without an 

 indication of an interrupted dorso-lateral fold, smooth 

 beneath; male with external vocal sacs ... R, guppyi, Blgr. 



II. Discs of fingers and toes broader than long ; lingual papilla long and pointed; 



male without vocal sacs ; terminal phalanges T-shaped or Y-shaped. 



1 Cf. Boulenger, Rec. Ind. Mus. XVI, p. 470 (1919). 



2 Cf. Boulenger, Ann. and Mag. N.H. (9) I, 1918, p. 372. 



