1920.] O. A. BouLENGER : Frogs of the Genus Rana. yr 



A single specimen from Yin tsin wan, Wassu State, Tibet, 

 preserved in the British Museum. 



Distinguished from R. gammici by the distinct tympanum, 

 the presence of a tarsal fold, the larger metatarsal tubercle, and the 

 presence of vocal sacs; from/?, feae^hy the swollen tips of the 

 toes and the distinct canthus rostralis ; from R. yuunanensis, by the 

 less ])rominent metatarsal tubercle. 



30. Rana sternosignata. 



Rana sternosignata, J. A. Murray, Ann. and Mag. N.H. '5) X\'l, 1S85, 

 p. 120; Bouleng., Faun, hid., Rept. p. 445, (18901; Aiinand., Mem. As 

 Soc. Beng. VI, 191 7, p. 139. 



Vomerine teeth in small oblique groups between the choanae 

 and extending a little beyond the level of their posterior borders 



Head much broader than long, much depressed ; snout round- 

 ed, scarcel}' projecting bej-ond the mouth, a little shorter than the 

 eye; no canthus rostralis: loreal region very oblique, slightly con- 

 cave ; nostril a little nearer the eye than the end of the snout ; the 

 distance between the nostrils greater than the interorbital width, 

 which is less than that of the upper eyelid ; tj'mpanum not very 

 distinct, not quite half the diameter of the eye and equal to the 

 distance from the latter. 



Fingers obtuse, first as long as or a little shorter than the 

 second; subarticular tubercles small, moderately prominent 



Hind limb rather short, the tibio-tarsal articulation reaching 

 the temple or the posterior border of the ej'e, the heels not overlap- 

 ping when the limbs are folded at right angles to the bod\- ; tibia 

 3 to 3| times as long as broad, 2> to 21 times in length from snout 

 to vent, as long as or a little shorter than the foot, shorter than 

 the fore limb. Toes obtuse or very slightly swollen at the tips, 

 entirely webbed ; subarticular tubercles very small, moderately 

 prominent; a feeble tarsal fold ; inner metatarsal tubercle narrow, 

 feebly ])rominent, j, to \ the length of the inner toe ; no outer 

 tubercle. 



Upper parts smooth or with small warts, which may be tipped 

 with black hornj- spines ; a feeble fold across the head, behind the 

 eyes ; a glandular fold from the eye to the shoulder ; lower parts 

 smooth. 



Olive-brown above, uniform or freckled with darker; limbs 

 without transverse bands. Lower parts whitish, mottled or 

 marbled with dark brown, at least on the throat and limbs. 



Males with internal vocal sacs, arms much thickened ; breast 

 with black horny spines; similar spines, but more crowded, on 

 the inner metacarpal tubercle and on the upper surface of the two 

 inner fingers. 



Nasals large and in contact with each other and with the fronto- 

 parietals, which entirely cover the ethmoid ; zygomatic branch of 

 squamosal long and curved, extending to below the eye. Omo- 

 sternal style entire. 



