1905. | MAMMALS OF CHINA. 385 
8. Idus losea Swinh. 
9. Mus griseipectus A. M.-H. 
10. Mus norvegicus Erxl. 
11. Mus humiliatus A. M.-H. 
12. Mus musculus Linn. 
13. Micromys sylvaticus chevriert A. M.-H. 
14. Micromys sylvaticus draco Bary.-Hamilton. 
15. Micromys minutus pygmeus A. M.-K. 
16. Micromys agrarius manchuricus Thos. 
17. Micromys agrarius ningpoensis Swinh. 
Mus EpwArRpst Thos. 
Mus edwardsi Thos. P. Z. 8. 1882, p. 587, pl. xliv.; Thos. 
P. Z. 8. 1898, p. 773; Bonh. Fasc. Malayenses, Zool. vol. 1. 
pp. 33 & 36 (1903). 
This species was originally described from four examples sent 
to Paris by Pere David. The type is in the B.M. 82.6.16.1, 
the other three examples being in Paris and dated October 1872. 
This is a very large Rat belonging to the jerdoni group, of 
which it is typical of the subgroup bearing itsname. The British 
Museum now possesses a fine series of these Rats from Kuatun 
in N.W. Fokien. They seem to be very uniform and show 
remarkably little variation. 
The general colour is yellowish grey, some specimens being 
much yellower than others. Hach hair is slate-grey at its base 
and fulvous for the distal half, and interspersed among these hairs 
are long slender spines with dark tips as well as long black 
bristles. On the flanks, owing to the absence of the black bristles, 
the fulvous colour of the fur proper is more visible. 
The under parts are pure white. The tail is equal in length to 
the head and body, markedly bicolor, and covered with short 
hairs, while the last two or three inches are pure white. The 
feet are uniform dark brown with white margins and toes. 
Whiskers very long and entirely black with the exception of a 
few shorter white ones. 
The skull partakes of the usual characters associated with the 
jerdont group, é. g., long, narrow, flat, and with small bulle. The 
supraorbital ridges are well defined over the orbits and slightly 
flattened so as to produce a comparatively broad upper surface ; 
they end somewhat abruptly about halfway across the parietals. 
Below, owing to the smallness of the bulle, the basioccipital 
presents a broad surface and the external condyles are well 
developed. 
The dimensions (as given by Thomas and rendered into milli- 
metres) are as follows :—Head and body 300; tail 289; hind 
foot 57; ear 24. 
Skull. Greatest breadth 57 mm.; basilar length 44; palatal 
length 24:5; diastema 15; incisive foramina 10; length of nasals 
22°5; zygomatic breadth 26; interorbital breadth 9°5; breadth 
of brain-case 22; length of molar series (alveoli) 11. 
