1920.] G. A. BouLENGER : Frogs of the Genus Rana. 85 



39. Rana plancyi. 



Rami plancyi. I.iitasle, Lc Natural iste, 1880, p. iio, and Bull. Soc. Zool 

 France, 18S0, p. 64 ; Bouleng-., Cat. Batr. Ecaud. p. 57 ( 1882) ; Stcjneg. 

 Her p. Jap. p. loi (1907). 



Vomerine teeth in more or less oblique groups or short series 

 between the choanae, or extending little beyond the level of their 

 posterior borders, equally distant from each other and from the 

 choanae or nearer each other. 



Head rather depressed, as long as broad ; snout rounded or 

 obtusely pointed, scarcely projecting beyond the mouth, as long as 

 or slightly longer than the eye; canthus rostral is very obtuse; 

 loreal region oblique, slightly concave; nostril equidistant from 

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

 nostrils greater than the interorbital width, which is much less 

 than that of the upper eyelid ; tympanum very distinct, f to once 

 the diameter of the eye, close to it or narrowly separated. 



Fingers moderate, pointed, first longer than the second, third 

 longer than the snout ; subarticular tubercles rather small, moder- 

 ately prominent. 



Hind limb moderate, the tibio-tarsal articulation reaching the 

 tympanum or the ej^e, the heels meeting or narrowly separated 

 when the limbs are folded at right angles to the body ; tibia 3 to 

 3 J times as long as broad, 2 to 2:] times in length from snout to 

 vent, much shorter than the fore limb or than the foot. Toes 

 pointed, fully webbed or last phalanx of fourth free; outer meta- 

 tarsals separated nearly to the base ; subarticular tubercles small, 

 moderately prominent ; no tarsal fold ; inner metatarsal tubercle 

 compressed, more or less oblique, ? to f the length of the inner 

 toe ; a small, rather indistinct outer tubercle. 



Skin smooth ; a prominent glandular dorso-lateral fold, from 

 above the tympanum to the hip, broad or rather broad, often 

 as broad as the upper eyelid. 



Olive above (green in life ?), uniform or with small dark spots ; 

 a more or less distinct dark streak on the canthus rostralis ; dorso- 

 lateral fold and tympanum bronzy ; a light vertebral streak some- 

 times present ; a blackish band along the hinder side of the thigh 

 and another, sometimes indistinct, along each side of the belly. 

 Lower parts white, uniform or with small brown spots on the 

 throat and breast. 



Males with internal vocal sacs and a moderately large pad on 

 the inner side of the first finger. 



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

 frontoparietals. Omosternal style entire. Terminal phalanges 

 pointed. 



Habitat. China and Formosa. 



[Very abundant at the edge of the T'ai-Hu (Great Lake) in- 

 land from Shanghai. N. A.'\ 



This species is very closely allied to R. esculenia, but less 

 specialized, and constitutes a link with the American frogs allied 

 to R. catesbiana. 



