240 SOME CHINESE VERTEBRATES. 
from Washan, Lianghokow, and Tachiao, all in western Szechwan, at altitudes 
of from 3,000 to 12,000 feet. The skins are very uniform in color and agree 
closely with the excellent figures by Milne Edwards. The collector’s measure- 
ments of the fresh specimens show the following extremes: — total length, 127-, 
155 mm.; tail, 59-72; hind foot, 14-17.5; average of nine specimens, 137, 65 
and 16 mm., respectively for these three dimensions. 
The tooth formula of this species was supposed by Milne Edwards to be 
12C}P?M2. Thomas (1912), however, in a series of specimens from Omisan 
found that the formula included four upper premolars and two lower incisors; 
and although in other respects the specimens showed no differences, he founded 
for them the genus and species Rhynchonax andersont. Curiously enough, our 
series shows still a different formula. All the specimens have a large and a 
second minute lower incisor, as in “Rhynchonax’’; but four have three, and 
three others have a fourth upper premolar. It would seem that the variation is 
individual rather than generic, since the two variations occur in specimens from 
the same locality that are otherwise identical. I prefer to regard these as 
variants of a single species, which is in process of losing the minute upper 
third premolar and the small lower incisor, and which in the individual 
presence or absence of these teeth shows parallelism with numerous similar 
cases among the Chiroptera. 
SORICIDAE. 
ANUROSOREX SQUAMIPES Milne Edwards. 
A fine series of this almost tailless shrew was secured from Washan, in 
western Szechwan, and a few additional specimens are from Hupeh, at Hsien- 
shanhsien, 4,500 feet, and Changyanghsien, 5,500 feet. These all show a close 
agreement among themselves, and average smaller than the measurements 
given by Milne Edwards for the type, as will appear from the following table 
which includes, first the dimensions of the type, then those of three specimens 
from Hupeh: — , 
Hupeh Hupeh Hupeh 
Type 7227 oS 7228 9 7226 9 
Total length 110 100 98 98 
Tail 9 10 10 il 
Hind foot 16 15 15 15 
Length of skull 27 24 20.0 _ 
Greatest breadth of skull 15 — 13.2 — 
Upper tooth row 13 11.2 12 IG LBys 
Lower tooth row 12 10 il 10.7 
