Descriptions of East Asiatic Mammals 273 
species of Rats exist and often they appear much more alike. 
Only the subfamily Murinae comes within the area dealt with 
in this book; dentition (Fig. 57, b). 
SUBFAMILY MURINE 
For the convenience of the readers of this book, the Rats and 
Mice are grouped into three categories: those Murinae which 
have the hind foot either completely or incipiently hand-like, 
with the great toe wholly or partly opposable to the other toes ; 
and the "Mice," and "Rats." The first group includes the 
Old World Harvest Mice, Micromys, in which opposability is 
imperfect; the Long-tailed Climbing Mice, Vandeleuria; 
Vernay's Climbing Mice, Vernaya, intermediate between these 
two genera; the Pencil-tailed Tree Mice, Chiropodomys; the 
Marmoset Mice, Hapalomys; the Monkey-handed Rat, Pithe- 
cheir ; and the Burma Tree Mouse, Chiromyscus. 
The remaining Rats and Mice, in which the feet are not so 
modified for climbing, may be divided arbitrarily but unscien- 
tifically into "Mice" and "Rats." The "Mice" are relatively 
small ; the "Rats," with few exceptions, are large or very large. 
The "Mice" include the House Mice, Mas; the Jungle Mice, 
Leggada; Flat-haired Jungle Mice, Leggadilla; Millard's Mice, 
Millardia; Golimda; and the Old World Wood Mice, Apodemus, 
and its subgenus Sylvcemus. 
All those murines left over fall into the third group, the 
"Rats," which includes the True Rats, Rattus (containing, be- 
sides many large forms, a few rather small, mouse-like species) ; 
the Large-toothed Rats, Dacnomys; the Bandicoot Rats, Bandi- 
cota and Gunomys. Any other rat-like animals that may be en- 
countered in eastern Asia belong to subfamilies other than the 
Murinae. 
The Old World Harvest Mice, Micromys (unrelated to 
the American Harvest Mice) are among the tiniest of rodents. 
