1920.] G. A. B0UL,ENGER : Frogs of the Genus Rana. 141 



Habitat. Fudacho village, Formosa, altitude about 4,000 feet. 

 But for the digital dilatations this species resembles very 

 closely R. pieiiraden, from which it is probably derived. 



69. Rana gracilis. 



Rana gracilis, Gravenh. Delic. Miis. Zool. Vvatisl. p. 45, pi. viii, fio-. -^ 

 (1829) ; Boiileng. Faun. Ind., Repf. p. 456 (1890); VV. Sclater,' P%oc. 

 Zool. Soc. 1892, p. 345. 



Limnodyies maculariiis, Blyth, Joitrn. As. Soc. Beng. XXIII, i8';4, 

 p. 299. 



Rana malabarica, part., Giinth. Cat. Bafr. Sal. p. 11 (1858). 



Hylovana macularia, Giinth. Rept. Brit. Ind. p. 425, pi. xxvi, fig. c (1864). 



Rana macularia, Bouleng. Cat. Batr. Ecaiid. p. 60 (1882). 



Vomerine teeth in short oblique series between the choanee 

 nearer to each other than to the latter. 



Head moderately depressed, as long as broad or longer than 

 broad ; snout obtusely pointed, projecting beyond the mouth, as 

 long as or a little longer than the eye ; canthus rostralis obtuse ; 

 loreal region feebly oblique or nearly vertical, concave ; nostril a 

 little nearer the tip of the snout than the eye ; distance between the 

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

 equals or a little exceeds that of the upper eyelid ; tympanum 

 very distinct, t to f the diameter of the eye, close to it or sepa- 

 rated from it by a space not exceeding ^ its diameter. 



Fingers long and slender, merely swollen at the end, first longer 

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

 tubercles large, very prominent. 



Hind limb long and slender, the tibio-tarsal articulation reach- 

 ing the nostril, the tip of the snout, or a little beyond, the heels 

 strongly overlapping when the limbs are folded at right angles to 

 the body ; tibia 4 to 4^ times as long as broad, i| to if times in 

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

 or slightly shorter than the foot. Toes long and slender the 

 tips dilated into very small discs, which are a little longer 

 than broad and with a groove separating the upper from the 

 lower surface, ^ webbed, 3 phalanges of fourth and 2 of third and 

 fifth free ; outer metatarsals separated by web nearly to the base ; 

 subarticular tubercles rather small but very prominent ; no tarsal 

 fold ; inner metatarsal tubercle oval, i to ^ the length of the 

 inner toe ; a round outer metatarsal tubercle. 



Skin smooth or feebly granulate above ; a moderate or rather 

 broad glandular dorso-lateral fold, from above the tympanum to the 

 groin ; the distance between the dorso-lateral folds, on the back, 

 ■g- to i the length of head and body ; another glandular fold from 



