54 Mammals of Eastern Asia 
the hands and feet gray. The length of head and body is 2% 
inches, tail 2 inches, hind foot % inch. 
Finally there is a long-tailed group of forms exemplified by 
Soriculus lencops. In this species the length of the head and 
body, 3 inches, is exceeded by the length of the tail, 3% inches. 
The hind foot measures % inch. The color is uniform blackish 
brown, with the tip of the tail white. Other related (or perhaps 
identical) long-tailed forms are macrurus from Darjiling and 
Irene from Szechwan, 5200 feet. These have the head and body 
from 2 to 2% inches in length, the tail 3% to 3% inches. 
S. baileyi, a related form from the Mishmi Hills, 7500 feet, also 
reported from Tonkin, has the length of head and body 2% 
inches, of the tail 3 inches. This type of Shrew occurs also in 
Burma and Yunnan. 
Kastschenko's Long-tailed Shrews, genus Chodsigoa, have 
only 28 teeth, two less than Soriculus and four less than Sorex. 
It is scarcely to be doubted that these denizens of the mountains 
of southern and central Asia are derived from Soriculus-likt 
ancestors and that those in their turn were descended from pre- 
historic forms of Sorex. Chodsigoa includes several rather dis- 
tinct species and a number of other races that are not always 
well defined. Four chief types are recognizable. These are 
C. hypsibia = berezowski, a moderately large species in which 
the tail is distinctly shorter than the combined head and body, 
and measurements, which vary considerably, are length of head 
and body 3% to 3% inches, tail 1% to 2 inches, hind foot 
% to % inch; C. smithii, with head and body from 2% to 3% 
inches, but the tail a little less than or slightly longer than head 
and body, 2% to 3% inches, hind foot about % inch; C. salen- 
skii, with the tail much longer than the combined head and 
body: head and body, 3 1 / 4 inches, tail 4% inches, hind foot, 
% inch; and a fourth group, C. sodalis, occupied by "the small- 
est of the species,'' from Formosa at 8000 feet. The measure- 
ments of this last are unknown because it was described from a 
