208 
JOURNAL OF MAMMALOGY 
ON THREE NEW MAMMALS FROM JAPAN 
By Nagamichi Kuroda, M.A.S.M. 
The following mammals from Japan seem to be undescribed. They 
are preserved in my own collection. All measurements are in milli- 
meters. 
Sciuropterus russicus orii subsp. nov. 
Characters . — Resembles S. russicus russicus Tiedemann of Siberia and 
Russia, but the greatest length of skull and mandible longer, the breadth of in- 
terorbital constriction narrower, the length of upper and lower tooth-rows shorter. 
It differs from S. russicus athene Thomas of Sakhalin, by the much paler coloration 
of body, by the greatest length of skull longer, by the zygomatic breadth wider, 
by the palatal foramina longer, and by the upper tooth-row shorter. It es- 
sentially differs from S. momonga momonga (Temminck) and S. momonga amyg- 
dali Thomas of Japan. 
Description . — Upper parts a uniform pale silvery gray, with a clay cast; 
the region of crown and nape tinged with a deep tone of the color; lores and 
cheeks paler and almost white; a narrow blackish eye-ring; under parts and 
Dimensions of the type and other specimens 
LOCALITY 
DATE 
HEAD 
AND 
BODY 
TAIL 
HIND 
FOOT 
EAB 
SEX 
MEASURED 
BY 
Kushiro, Hokkaido 
1909 
150 
121 
34 
20 
cf’ 
H. Orii 
Kushiro, Hokkaido 
1909 
147 
118 
35 
19.5 
H. Orii 
Uyenai, Iburi, Hokkaido . 
February, 1915 
153 
105 
33.5 
21.5 
(d’ 
H. Orii 
Uyenai, Iburi, Hokkaido . 
February, 1915 
146 
97.5 
32.5 
20 
d' 
H. Orii 
Uyenai, Iburi, Hokkaido . 
February, 1915 
148 
112 
32 
20.5 
d 
H. Orii 
Uyenai, Iburi, Hokkaido . 
March 13, 1920 
163 
117 
34 
19.5 
9 
H. Orii 
Comparative measurements of skulls of three forms of S. russicus 
SUBSPECIES 
GREATEST LENGTH 
BASILAR LENGTH 
ZYGOMATIC BREADTH 
POSTORBITAL CON- 
STRICTION 
INTERORBITAL CON- 
STRICTION 
ROSTRAL BREADTH 
AT FRONT OF NASAL 
NASAL 
DIASTEMA 
PALATILAR LENGTH 
PALATAL FORAMINA 
p 
w 
fe 
o 
a 
Eh 
O 
Iz; 
w 
MANDIBLE 
UPPER TOOTH-ROW 
LOWER TOOTH-ROW 
MEASURED BY 
S. r. orii* . . . 
39.5 
30.5 
24 
9.0 
7.5 
6.5 
13.0 
8.0 
17.0 
5.5 
10.5 
24.5 
6.5 
6.5 
Kuroda 
S. r. athene.. 
37.0 
28.0 
22 
— 
7.0 
— 
— 
— 
16.2 
4.8 
10.1 
— 
7.2 
— 
Thomas 
S. r. russicus 
36.2- 
— 
24rb- 
9-9.4 
8.4- 
6.4- 
12.8- 
8.2 
— 
— 
— 
23.2 
7.2 
7.2 
Miller 
36.8 
24.2 
9 
6.8 
13.2 
7.4 
Type specimen. 
