1866.] DR. J. E. GRAY ON AUSTRALIAN MAMMALS. 221 



shoulders darker ; side of the head, near base of ears, and body pale 

 reddish ; shoulders outside of fore and hind legs paler bay ; streak 

 on cheek and upper part of thigh white. 



Hub. North Australia, Port Albany (Coxen). 



Tins species is very like H. agilis ; but the tail and hind feet are 

 much shorter. The fur is darker, and especially on the nape and 

 upper part of the middle of the back. The sides of the body and 

 face, and especially the head round the base of the ears, and the legs 

 are bright rufous. The white mark on the thigh is as distinct as in 

 H. agilis. 



The Halmaturi with a well-marked oblique white streak across 

 the thigh may be thus divided : — 



* Tail and feet elongate; the front and hinder cutting-teeth large, 

 the second one moderate. 



1. Halmaturus dorsalis. 



The back with a narrow well-defined dorsal streak. The second or 

 central cutting-tooth on each side small, smooth. The hind foot 

 8| inches long. 



2. Halmaturus agilis. 



The back on each side darker than the sides. The second or 

 central cutting-tooth on each side with a central ridge. The hind 

 foot 8| inches long. 



** Tail and feet short, thick ; the front and hinder cutting-teeth 

 moderate, the second one small. 



3. Halmaturus coxenii. 



Back darker than the sides. The hind feet 5| inches long. 



I have named this fine species after Mr. Charles Coxen, the 

 brother of the late Mrs. Gould, the discoverer of several very inter- 

 esting animals in Australia. 



Mus macropus. 



Yellow grey brown ; middle of the back blackish, from the black 

 tips of the longer hairs ; the mouth, throat, chest, belly, inside of 

 the legs, and the upper surface of the feet white ; whiskers very long, 

 stiff, black ; tail naked, with rings of square scales, yellow, basal 

 third black. The feet nearly naked. The cutting-teeth flat, smooth, 

 yellow in front. Ears nakedish, with short scattered hairs. Length 

 of body and head 10 J, tail 10^ inches ; hind feet 2 inches 5 lines. 



There are three species of Mus in the Museum with the tails 

 more or less varied with yellow, which differ in the size of the cut- 

 ting-teeth and feet. The one from North Australia differs from the 

 other two in having very much larger feet. 



