1906.] MAMMALS FROM KOREA. 863 



as Mlcromys peninsula' would gi\e no iudicMtioii of the rela- 

 tions of the animal ; while treating it as a subspecies shows at 

 once of which of the six widely- distributed specie'^ it is a local 

 representative. 



6. MiCROMYS AGRARIUS MANTCHURICUS ThoS. 



cT. 612. Fusan, S. Korea. 150'. 



J. 613, 615, 634. $.614. Mok-pho. 200'. 



cT . 636, 637, 638, 644, 645, 646, 647, 648. $ . 635, 639, 640 

 642, 643. Tong-pok, 60 miles N.E. of Mok-pho. 500'. 



J. 665, 670,^678, 679, 680, 707. $ . 649, 650, 654, 662, 664, 

 666, 667, 668, 687. Min-gyong, 110 miles S.E. of Seoul. 1000'. 



c? . 727, 735, 736, 744. " $ .'726, 731, 734, 743. Kear Taiku, 

 S. Korea. 1200'. 



cJ. 620, 628, 630, 631. $. 618, 621, 622, 624, 625, 632. 

 Quelpart Id. 3000-4500'. 



The extvaordinary variation in this species rendei'S its deter- 

 mination veiy difficult, and I use the above name only pro- 

 visionally. For, on the one hand, further Manchurian material 

 may bring out some diffei-ence between the Korean and Man- 

 churian f oi-ms, and on the othei' it is possible that both will pi'ove 

 indistinguishable from the Chinese oiingpoensis. 



In the present fine series, examples ai'e to be found with strongly 

 marked dorsal stripe and others almost or quite without it. In 

 general colour, also, some are strongly rufous while others are 

 grey. 



In character of fur we find here again, as in Jf. sjyeciosus, the 

 chaiv'icteristic of the summei- coat being spinous, while that of the 

 winter is quite soft ; and to this rule no exception occurs among 

 the present series. 



There does not appear- to be any difiei'ence between the spe- 

 cimens from Quelpait and those from the Korean mainland — a 

 somewhat remarkable fact, considering the distance out to sea, at 

 which the island is situated. The occurrence of this species, 

 which is wholly absent from any part of Japan, is conclusi%-e 

 evidence of the Koi'ean rather than Japanese character of the 

 Quelpart fauna. 



7. MiCROMYS MINUTUS USSURICUS B. Ham. 



(S . 656. Min-gyong, 110 miles S.E. of Seoul. 1000'. 



c^. 737. $ . 721. "lO miles N. of Taiku, S. Korea. 



These specimens agree with the type fi'om the TJssuri in! the 

 small size of their teeth as compared with the Japanese M. m. 

 japonicus. They vary, however, a good deal in colour. 



8. Craseomys regulus, sp. n. 



S . 661, 689, 692, 697, 703, 704, 710, 711, 715. $ . 653, 660, 

 675, 690, 698, 701, 702, 706, 712. Min-ijyong, 110 miles S.E. of 

 Seoul. Alt. 1100-1300 ft. 



