1920.] G. A. BOUI.ENGER : Frogs of the Genus Rana. 97 



Vomerine teeth in oblique series between the choanae, ex- 

 tending to or narrowly separated from the inner anterior corners 

 of the latter. 



Head rather strongly depressed, slightly longer than broad 

 or slightly broader than long ; snout obtusely pomted, projecting 

 beyond the mouth, as long as the e^^e ; canthus rostralis distinct ; 

 loreal region moderately oblique, concave; nostril equidistant 

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

 nostrils greater than the interorbital width, which is equal to or a 

 little less than that of the upper eyelid ; tympanum very distinct, 

 I to -+ the diameter of the eye and 2 to 3 times its distance from 

 the latter. 



Fingers obtuse or with the tips slightly swollen, first longer 

 than the second, third slightly longer than the snout ; subarticular 

 tubercles rather large and very prominent. 



Hind limb moderately long, the tibio-tarsal articulation reach- 

 ing the anterior border of the eye, the heels strongly overlapping 

 when the limbs are folded at right angles to the body ; tibia 4 to 

 4|- times as long as broad, twice or a little more than twice in 

 length from snout to vent, shorter than the fore limb, as long as 

 or slightly shorter than the foot. Toes obtuse or with the tips 

 slightly swollen, I or I webbed, 3 phalanges of fourth free ; outer 

 metatarsals separated in their distal ^ or f ; subarticular tubercles 

 rather small, prominent ; no tarsal fold ; inner metatarsal tuVjercle 

 strongly compressed and very prominent, f to f the length of the 

 inner toe ; outer tubercle absent or very small and very indistinct. 



Upper parts smooth or finely granulate ; a narrow glandular 

 dorso-lateral fold from above the t5^mpanum to the hip and an- 

 other from below the eye to the shoulder ; the distance between 

 the dorso-lateral folds, on the back, about i the length from 

 snout to vent ; lower parts smooth. 



Upper parts grey or bright crimson ; sides of _ body sometimes 

 black, the two colours sharply separated by the dorso-lateral fold; 

 loreal region and temple black, separated from the grey or black 

 upper lip by a white streak which sends up a process behind the 

 tympanum ; hind limbs with more or less distinct dark cross-bars ; 

 a more or less distinct dark band along the anterior side of the 

 thigh ; sometimes a dark band on each side of the belly. Lower 

 parts white ; males with the throat blackish with a whitish median 

 line and the breast closely spotted with blackish. 



Males with internal vocal sacs and a moderately large pad 

 on the inner side of the first finger. 



Nasal bones narrow, oblique, and widely separated from each 

 other and from the frontoparietals. 



The tadpole has been described by Malcolm Smith. Tail not 

 quite twice as long as the body, obtusely pointed. Beak edged 

 with black ; two rows of long papillae on the lower lip ; upper lip 

 with a long continuous row of teeth and a second broadly in- 

 terrupted by the beak ; lower lip with 3 rows of teeth, the inner- 

 most usually narrowly interrupted. 



