1907.] MAMMALS FROM KOREA. 463 



6 . 1131. Kim-hoa, 65 miles N.E. of Seoul, 300'. 

 S. 1166. $. 1154. Chong-ju, Ohung-Chong Prov., S. of 

 Seoul, 500-800'. 



3, MOGERA WOGURA OOREANA, Subsp. 11, 



<^. 1143. Kim-hoa, 65 miles N.E. of Seoul, 300', 19tli Nov., 

 1906. B.M. No. 7.6.3.13. Tyjje. (A specimen from Seoul pre ■ 

 sented by Mr. 0. W. Campbell in 1891.) 



General characters as in Af. xoogura ; size intermediate between 

 M. w. kanai and the large M. to. kobece, falling far short of the 

 gigantic 3£. robusta of Vladivostok. Colour brown (dark " mouse - 

 grey ") as usual in M. tvogura. Anterior upper premolar two- 

 rooted, considerably higher than p'. 



Dimensions of the type : — 



Head and body 135 mm. ; tail 21 ; hind foot 20. 



Skull: greatest length 37"5 mm.; basal length 32"5; greatest 

 breadth 18'2 ; interorbital breadth 8'4 ; palatal length 16 ; front 

 of canine to base of m' 14'3. 



Hab. and Type as above. 



The diiferent forms of Mogera are chiefly distinguishable by 

 size, and may be most readily understood by forming an index- 

 number from the length multiplied by the breadth of the skull, 

 and then arranging the resulting numbers geographically. It thus 

 appears that the true tvogvra, from Tokyo, Yokohama, and north- 

 wards, has index-numbers from 575-600, while there is a broad 

 band of the large kobece (712-796) ranging from the Oki Islands 

 across Kobe to Shikoku and Owari Bay. Then again westwards 

 in Nagasaki, the Goto Islands, and Yakushima we have the 

 smaller M. 'W. kancd, with index-numbers from 581 to 637, a single 

 skull from Tsu-shima being about the same (642). In the north, 

 according to Nehring's calculated figures, 31. robusta indexes no 

 less than 936, followed immediately southwards by the present 

 animal, of which the type has an index of 682, the second specimen, 

 from Seoul, being of about the same size. 



Just as the largest Mogera is found in the north, at Vladivostok, 

 so in the south, in China and Formosa, we find the smallest. 

 AI. insularis Swinh. from Formosa has index-numbers of 483-496, 

 while the following new species, from China, is still smaller : — 



Mogera latouchei, sp. n. 



Tal2ia wogura Thos. P. Z. S. 1898, p. 771. 



Size very small, index-numbers of skull 390-406. First upper 

 premolar single-rooted, shorter than p^ (as in 31. insularis) ; brain- 

 case rounded, its outer corners not sharply angular as in the 

 different forms of 31. loogura. Colour blackish slaty, more as in 

 European Moles, not brown as in 3£. xooguroj. 



Dimensions of type (measured on the spirit-specimen) : — 



Head and body 96 mm. ; tail 16 ; hind foot 13'5. 

 Proc. Zool. Soc— 1907, No. XXXII. 32 



