24 Records of the Indian Museum. [Vol. XX, 



The shape of the head varies greatly ; it is often quite as 

 long as broad, and it may even be slightly longer ' ; the snout 

 may be broadly rounded or as pointed as in any specimen of the 

 typical R. tigrina. The diameter of the tympanum is |- to f that 

 of the eye and i^ to 2 times its distance from the latter. 



The tibio-tarsal articulation reaches the eye or between the 

 eye and the nostril, exceptionally only as far as the tympanum* ; 

 the heels strongly overlap ; the length of the tibia is 2i to 3 times 

 its width and is contained if to 2^ times in the length from snout 

 to vent. The web between the toes is strongly notched and does 

 not reach the tip of the fourth ; in some specimens even the two 

 last phalanges of the fourth toe are free, and such may be des- 

 cribed as having the foot f webbed. The inner metatarsal tubercle 

 is blunt audits length is contained 2^ to 3 times in that of the 

 inner toe ; no outer tubercle. 



Longitudinal dermal folds, in the strict sense, are often absent 

 on the body ; if present, they are reduced to 2 or 3 pairs, the 

 longest of which start from behind the upper eyelid at some dis- 

 tance from the supratemporal fold ; a V-shaped glandular fold often 

 present in the middle of the back, between the shoulders. 



The coloration is much as in R. tigrina, var. pan'herina, but 

 there may be, rather exceptionally,^ a light streak along the side 

 of the body, as in the typical R. tigrina ; a light vertebral line or 

 broad band is sometimes present, but it is very rarely accompanied 

 by a light line along the calf.* Lower parts white, rarely spotted 

 or marbled with blackish ; the male's gular sacs grey or blackish. 



The tadpole is verj^ different from that of /?. tigrina and 

 hardly to be distinguished from that of R. limnocharis. The beak 

 is devoid of the strong cusps and is white edged with black, and 

 the horny teeth are in 2 upper and 3 lower series, all except the 

 inner upper long and uninterrupted ; the margiiral papillae are pre- 

 sent only on the sides of the upper lip. The tail is rather obtusely 

 pointed, and not twice as long as the body. 



The eggs measure i to ly millim. in diameter. 



Habitat. Malay Peninsula and Archipelago. The types of 

 R. vittigera and R. rugiilosa are from the Philippines and China 

 (Macao, Cape S3'ng-more). 



[Rana cancrivora is bj' far the commonest frog in rice-fields 

 and ditches round the Inland Sea of Singgora in Peninsular Siam 

 and also in the Malay State of Patani. It appears, however, to be 

 rare (if it exists) in the southern districts of the Malay Peninsula. 



Individuals are frequently found in brackish water, and I have 

 seen one jump into the sea from a rock and swim ashore appar- 

 ently without suffering. A'. ^.]. 



Completely linked with R. ligrina through the var. pantherina, 

 it is highly remarkable for this species to be characterized by so 



' In a male from Padas, Borneo. 2 In a fema'e from Chumpon, Siam. 



° Specimens from the Philippines and Celebes. 

 * .Specimens from the Philippmes. 



