604 
PACIFIC SCIENCE, Vol. XV, October 1961 
habits Kyushu, Shikoku, and Honshu, and E. 
kageus occupies the northern half of Honshu. 
ACKNOWLEDGMENTS 
The specimens discussed above were collected 
with the help of Dr. Tatsuo Udagawa, Mr. Ko- 
hei Sakaguti, Dr. Ryo Tanaka, and Dr. Kasio 
Ota, with whom I made many excursions. To 
these gentlemen I am most grateful. Dr. Richard 
van Gelder ( American Museum of Natural His- 
tory), and Dr. John E. Hill (British Museum 
[Natural History]), generously loaned compara- 
tive material. Dr. David H. Johnson graciously 
read the manuscript. 
REFERENCES 
Allen, Glover M. 1940. Natural History of 
Central Asia, vol. XI, part 2. The mammals 
of China and Mongolia. American Museum 
of Natural History. Part 2: 621-1350. 
Ellerman, J. R. 1941. The Families and 
Genera of Living Rodents. British Museum 
(Natural History). Vol. II, 690 pp. 
Ellerman, J. R., and T. C. S. Morrison- 
SCOTT. 1951. Checklist of Palaearctic and In- 
dian Mammals, 1758 to 1946. British Mu- 
seum (Natural History). 810 pp. 
Hinton, M. A. C. 1926. Monograph of the 
Voles and Lemmings ( Microtinae ) , Living 
and Extinct. British Museum (Natural His- 
tory). 488 pp. 
Imaizumi, Yoshinori. 1944. [Mammals of the 
Narusawa-mura District on the northern slope 
of Mt. Fuji.] Shizen Kagaku to Hakubutsu- 
kan 18(1): 1-10. [In Japanese.] 
1957. Taxonomic studies on the red- 
backed vole from Japan, Part I. Major divi- 
sions of the vole and descriptions of Eothen- 
omys with a new species. Bulletin, National 
Science Museum (Tokyo), no. 40: 195-216. 
I960. The Mammals of Japan. Hoiku- 
sha, Osaka. 196 pp. 
Miller, Gerrit S., Jr. 1896. Genera and Sub- 
genera of Voles and Lemmings. North Amer- 
ican Fauna no. 12. 78 pp. 
1898^. Description of a new genus and 
species of microtine rodent from Siberia. 
Proc. Acad. Nat. Sciences of Philadelphia 
50: 368-371. 
1898 A Notes on Arctic red-backed 
mice. Proc. Acad. Nat. Sciences of Philadel- 
phia 50: 355-367. 
1900. Preliminary revision of the Euro- 
pean red backed mice. Proc. Wash. Acad. 
Sci. 11: 83-109. 
Ota, Kasio, and E. W. Jameson, Jr. In press. 
Ecological relationships and economic im- 
portance of Japanese microtinae. Ecology. 
Ridgway, Robert. 1912. Color Standards and 
Color Nomenclature. Author, Washington, 
D. C. 43 pp. + 53 color plates. 
Simpson, George Gaylord. 1947. Holarctic 
mammalian faunas and continental relation- 
ships during the Cenozoic. Bulletin, Geolog- 
ical Society of America 58(7): 613-687. 
Thomas, Oldfield. 1905. On some new Jap- 
anese mammals presented to the British Mu- 
seum by Mr. R. Gordon Smith. Annals and 
Magazine of Natural History 1 5 ( ser. 7): 
487-495. 
1905. The Duke of Bedford’s zoolog- 
ical exploration in eastern Asia, I. List of 
mammals obtained by Mr. M. P. Anderson in 
Japan. Proceedings, Zoological Society of 
London 2 (of 1905): 331-363. 
1907. The Duke of Bedford’s zoolog- 
ical exploration in eastern Asia. Proceedings, 
Zoological Society of London ( 1906) : 863. 
1908. The Duke of Bedford’s zoolog- 
ical exploration in eastern Asia, X. List of 
mammals from the Provinces of Chih-li and 
Shan-si, N. China. Proceedings, Zoological 
Society of London ( 1908) : 635-646. 
Tokuda, Mitosi. 1941. A revised monograph 
of the Japanese and Manchou-Korean Muri- 
dae. Transaction, Biogeographical Society of 
Japan 4 (1): 1-156. 
1950. [Field mice and shrews on Mts. 
Ontake and Yatsugatake, with special refer- 
ence to "sympatric” and "allopatric” mam- 
malian species found in these districts.] Doo- 
butsu Gaku Zasshi 59(9): 210-213. [In 
Japanese.] 
1953. Small mammals from Hokkoda 
(Aomori Prefecture) with special reference 
to "allopartic” shrew-moles in this district 
and other districts of Japan. Ecological Re- 
view 13(3): 129-134. 
1955. Congeneric species of voles found 
in Japan and Yunnan. Bulletin, Biogeograph- 
ical Society of Japan 16-19: 388-391. 
