1920.] G. A. Boui^ENGER : Frogs of the Genus Rana. ii 



Fingers slender, pointed, with a more or less distinct dermal 

 border, first longer than second, third longer than the snout; sub- 

 articular tubercles small, feebly prominent. 



Hind limb thick, moderately long, the tibio-tarsal articula- 

 tion reaching the tympanum or the eye, the heels meeting or 

 not when the limbs are folded at right angles to the body ; tibia 

 2 to 2^ times as long as broad, 2^ to 2^ times in length from 

 snout to vent, shorter than the fore limb or than the foot. Toes 

 pointed, with very broad web reaching the tips, the free border 

 almost rectilinear ; the fourth toe not extending very much 

 beyond the third and fifth ; outer metatarsals separated nearly to 

 the base ; subarticular tubercles very small or indistinct ; a strong 

 dermal fringe on the outer toe ; tarsal fold slightly distinct or 

 absent ; a small but very prominent, pointed, digitiform inner 

 metatarsal tubercle,' its base about \ the length of the inner toe; 

 no outer tubercle. 



Skin smooth above, with small porous warts on the sides ; 

 a strong fold from the eye to the shoulder, more or less dis- 

 tinctly connected with its fellow across the head just behind the 

 eyes. Lower parts more or less distinctly granulate, with enlarged 

 porous warts on the throat and under the thighs, and with a 

 curved series of porous warts (sensory organs) along each side of 

 the belly, and another near the flanks. 



Adult olive or dark brown above, sometimes with a yellow 

 vertebral streak, or with a yellowish lateral band from behind the 

 shoulder to the groin. Young with two or three yellowish bands 

 along the back, in addition to the lateral band. Lower parts white, 

 the thighs usually striped black and white, the black stripes two 

 or three in number. 



Males with a white external vocal sac on each side, projecting 

 through a slit close to the posterior third of the mandibular 

 ramus, the slit as long as or a little longer than the eye ; no other 

 secondary sexual characters.* 



Nasal bones large, in contact with each other and with the 

 frontoparietals, which are narrow and grooved along the sagittal 

 suture; ethmoid entirely covered over in the adult; zygomatic 

 branch of squamosal very long. Omosternal style forked at the 

 base. Terminal phalanges obtusely pointed. 



The tadpole has been described and figured by Ferguson and 

 by Annandale and Rao, and I have also examined specimens 

 from Cochin. Tail 2 to 2f times as long as body, acutely pointed, 

 with the dorsal crest extending on the body. Beak white, broadly 

 edged with black ; lip forming two lobes on each side ; only one 

 series of horny teeth in the upper lip, marginal; two or three on 

 the lower lip, the outer marginal, all, or only the outer, uninter- 

 rupted. 



^ Containing 3 or 4 ossicles on end. 



2 As observed by Ferguson in R. cyanophlyctls, the male does not clasp the 

 female in the manner our European frogs do, but digs the hands into the axils. 



