HEEPETOLOGY OF JAPAN. 



119 



most notable difference, however, is the presence of the strongly 

 developed outer metatarsal tubercle in the female specimen. 



There are a number of specimens from Tsushima, in British Museum, 

 collected by Hoist, and in 1S98 I was given the privilege of examining 

 them, but I fmd no reference to the presence of an outer metatarsal 

 tubercle, which may therefore be regarded as problematical. These 

 specimens were referred partly to R. japonica and partly to R. 7nar- 

 tensi. My own examination led me to the conclusion that they 

 belong to one species only, as I could not correlate any two of the 

 various differences. They were all short-snouted, with deeply incised 

 webs and narrow dorso-lateral folds. 



Habitat. — Only known from Tsushima, in the channel between 

 Japan and Corea, where specimens were collected by P. L. Jouy, in 

 May, 1885, and later by P. A. Hoist. 



List of specimens of Rana tsushimensis. 



n Type; description, p. 117; figs. 94- 



b Description, p. 118. 



P. 119 



RANA AMURENSIS" Boulenger. 



Plate XI, figs. 2-3. 



1853. ? Rana temporaria Middendorff, Sibir. Reise, II, ii, Pt. 1, p. 247, pi. 

 XXVI, fig. 3 a~c (Eastern Siberia). 



1886. RanaamurensisBovi,TS,NGF.n, Bull. Soc. Zool. France, 1886, p. 598; author's 

 separate (p. 4) (type-locality, Kazakevitch, Amur Province; type, Berlin 

 Mus. No. 9864); Ann. Mag. Nat. Hist. (6),V, Feb., 1890, p. 140, pi. ix, fig. 1 & 

 (Lake Khanka, Doerries, collector; Chemulpo, Korea); Proc. Zool. Soc. 

 London, 1890, p. 324. — ? Boettger, Ber. Sei]ckenberg. Naturf. Ges., 

 1894, p. 146 (Chinghai, near Ningpo, China). — Bedriaga, Przewalski 

 Reise, Zool., Ill, Pt. 1, 1899, (p. 27).— Nikolski, Zap. Imp. Akad.Nauk, 

 S. Peterburg (8), XVII, No. 1, 1905, p. 369 (Kuku-Nor, Tibet). 



Rana amurensis seems to be closely related to true R. temporaria, 

 being round-snouted and short-legged. It differs, however, in the 

 more posterior position of the vomerine teeth which are almost entirely 

 behind the level of the choamie and, apparently, in having the inter- 

 orbital space narrower. The inner metatarsal tubercle is also unusu- 

 ally weak. As the two forms occur in the same locality, the Berlin 

 Museum having also true R. temporaria (No. 9865) from Kazake- 

 vitch, whence came the type of R. amurensis, there seems to be no 

 doubt as to the specific validity of the latter. 



Having no specimen at command, though it was my good fortune 

 to be allowed to examine the Ussuri an<l Korean specimens in the Brit- 



o Signifying from Amurland. b Reproduced in this work on Plate XI, figs. 2-3. 



