458 BOULENGER. 



and Indo-Malayan regions but not from elsewhere, with the single 

 exception of R. esculenta, var. chinensis, in which it is very rarely 

 present. 



14. Rana silvatica. 



Rana syhatica Leconte, Ann. Lye. N. Y., I, 1825, p. 282; Harl., Amer. 

 Journ. Sc, X, 1825, p. 58, and Journ. Ac. Philad., V, 1825, p. 338; Holbr., 

 N. Am. Herp. I, p. 95, PI. xv (1836); Dum. and Bibr., Erp. Gen., VIII, p. 

 362 (1841); Dekay. N. Y. Faun., Ill, p. 64, PI. xx, fig. 50, and xxi, fig. 54 

 (1842); Holbr., N. Am. Herp., Ed. 2, IV, p. 99, PI. xxiv (1842); Wied, 

 N. Acta Ac. Leop. Carol., XXXII, 1865, p. 114; De L'IsLE,Ann. Sc. Nat. (5), 

 XVII, 1872, No. 3, p. 4; Hinckley, Proc. Bost. Soc. N. H., XXI, 1881, p. 310, 

 PI. V, fig. 6; BouLENG., Cat. Batr. Ecaud., p. 47 (1882); Cope, Batr. N. Am., 

 p. 447, fig. (1889); H. Garm., Bull. Ulin. Lab., Ill, 1892, p. 330; Howe, Proc. 

 Bost. Soc, XXIX, 1899, p. 369; Dickerson, Frog Book, p. 205, PI. xiv, fig. 1, 

 and PI. Lxxviii and lxxix (1906); Wright, Publ. Carnegie Instit., No. 197, 

 1914, p. 87, PI. xxi; Bouleng., Ann. and Mag. N. H. (9) III, 1919, p. 410. 



Rana pennsylvanica Harl., Amer. Journ. Sc, X, 1825, p. 58; Bouleng., 

 Bull. Soc. Zool. France, 1879, p. 188. 



Rana temporaria var. silvatica, part., Gunth., Cat. Batr. Sal., p. 47 (1858). 



Vomerine teeth in small oblique groups on a level with or just behind 

 the posterior borders of the choanse, close together or nearer to each 

 other than to the latter. 



• Head as long as broad or a little broader than long, rather strongly 

 depressed ; snout rounded or obtusely pointed, more or less projecting 

 beyond the mouth, as long as or a little longer than the eye; canthus 

 rostralis obtuse; loreal region oblique, concave; nostril equidistant 

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

 trils equal to or greater than the interorbital width, which is equal to 

 or less than (about |) that of the upper eyelid; tympanum very dis- 

 tinct, I to § the diameter of the eye and 2 to 4 times its distance from 

 the latter. 



Fingers moderate, obtuse, first longer than second, third as long as 

 or longer than the snout; subarticular tubercles moderate or large, 

 very prominent. 



Hind limbs long, the tibio-tarsal articulation reaching 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 5 

 times as long as broad, If to 2 times in length from snout to vent, 

 as long as or slightly shorter than the fore limb and as long as or 

 slightly longer or shorter than the foot. Toes obtuse, | to f webbed, 



