1920.] G. A. BouLENGER : Frogs of the Genus Rana. 173 



Habitat. Man-Son Mountains, Tonkin, 3,000-4,000 ft. Closely 

 allied to R. alticola, which differs in the less prominent snout and 

 the less deeply concave loreal region. 



89. Rana arfaki. 



Rana arfaki, A. B. Meyer, Mon. Berl. Ac. 1874, p. 138 ; van Kampen, 



Nova Guinea, \ , Zool. p. 165 (igo6), and IX, Zool. p. 36 (1909); 



Bouleng-. Ann. and Mag. N.H. (g) I, 1918, p. 239. 

 Limnodytes arfaki, part., Peteis et Doria, Ann. Mus. Genova, XIII, 1878, 



p. 418. 

 Rana macroscelis, Bouleng. Ann. and Mag. N.H. (6) 1, 1888, p. 345; Ann. 



Mas. Genova, (2) XVIII, 1898, p. 706 ; Roux, Abii. Senck. Ges. 



XXXIII, 1910, p. 226 ; Bouleng- , Tr. Zool. Soc. XX, 1914, p. 249. 

 Rana ivaigeensis, van Kampen, Bijdr Dierk. XIX. 1913, p. 90, and Nova 



Guinea, IX, Zool. p 459, pi. xi, fig. 2 (1913). 



Vomerine teeth in straight or feebly curved, more or less 

 oblique series between the choana: or extending a little be^^ond 

 the level of the posterior borders of the latter, usually nearer each 

 other than the choanae. 



Head much depressed, as long as broad or broader than long ; 

 snout rounded or obtusely pointed, feebly projecting beyond the 

 mouth , as long as or a little longer than the e^^e ; canthus rostralis 

 distinct ; loreal region oblique, deeply concave ; nostril equidistant 

 from the eye and from the tip of the snout or a little nearer the 

 latter ; distance between the nostrils equal to or greater than the 

 interorbital region, which is usually slightly concave and measures 

 f to f, or rarely nearly equals, the width of the upper eyelid ; 

 tympanum very distinct, | or f the diameter of the eye, once to 

 twice its distance from the latter. 



Fingers rather long, the tips dilated into small discs which are 

 longer than broad and with a groove separating the upper from the 

 lower surface, first much longer than the second, third longer than 

 the snout, second and third with more or less distinct dermal mar- 

 gin ; subarticular tubercles large and prominent. 



Hind limb long, the tibio- tarsal articulation reaching between 

 the eye and the tip of the snout, the tip of the snout or slightly 

 beyond ; the heels feebly overlapping ; tibia 3 to 4 times as long as 

 broad, if to a little more than 2 times in length of head and body, 

 shorter than the fore limb, as long as or longer than the foot. 

 Toes with the tips dilated into small discs similar to those of the 

 fingers, webbed to the discs ; outer metatarsals separated nearly 

 to the base ; subarticular tubercles rather large, prominent ; no 

 tarsal fold ; inner metatarsal tubercle elliptic, moderately prom- 

 inent, ^ to I the length of the inner toe ; outer tubercle absent or 

 flat and rather indistinct. 



Upper parts smooth or shagreened, with or without small fiat 

 warts, or granulate with large elongate warts with small horny 

 spinules ; a glandular fold above the temple. Lower parts smooth, 

 posterior half of thigh granulate. 



Olive or brown above, uniform or with darker and lighter 

 spots, or reddish brown with scattered small yellow spots ; tj^mpa- 



