64 MR. 0. THOMAS ON THE MAMMALS OF (Jan. 19, 
edge of the anterior zygoma-root is concave, with an overhanging 
point ’ instead of being convex, (2) the palate is produced to behind 
the edge of the last molar, instead of ending opposite its centre. 
The first of these characters, although fairly common among the 
Australian Muride, is, to the best of my knowledge, not found in any 
of the other Muride either of Asia or Africa. In all other characters, 
in the development and direction of the supraorbital ridges, the 
length and shape of the nasals, the angles formed by the sutures on 
the brain-case, the length of the palatine foramina, &c., the two skulls 
are absolutely identical. 
Teeth Jarge and powerful ; incisors short and stout, the lower ones 
projecting only about 3 mm. beyond the bone, smooth, rounded, and 
ungrooved in front, dark orange-yellow above, rather lighter below ; 
molars broad and heavy, their structure as in Mus, and with no 
resemblance to those of Golunda; last molar nearly as large as the 
second, consisting both above and below of two well-defined equal- 
sized laminze. 
Measurements of the largest skin, a female. Head and body 
125 mm. ; tail 106; hind foot 25:0. Of a specimen softened and 
placed in spirit, head and body 118°0: hind-foot 26°5; heel to 
front of last foot-pad 12°0; forearm and hand 31°5; ear, above 
crown, 12:0. 
Skull, Length, bregma to nasal-tip 26°0; greatest breadth 15:0 ; 
length of face 14°5 ; nasals, length 10°0 ; interorbital breadth 4:5; 
palate, length 16-0 ; incisors to m* 8°3 ; palatine foramina 5:1 ; molar 
series 58: length of anterior zygoma-root 4:0; lower jaw, length 
(bone only) 18°3; to incisor-tips 19°2 ; projection of incisors 
(behind) 4°5. 
The general appearance of this species is infinitely more like that 
of the Gulandi (Golunda ellioti) than that of any of the other Indian 
members of the genus Mus. So like Golundu is it, indeed, in colour, 
proportions, and even in the general shape of its skull, that it might 
easily be mistaken for this animal, were it not for its slightly longer 
tail, less spiny fur, ungrooved incisors, and a few other little prominent 
characters which might easily be overlooked by a superficial observer. 
It thus seems to bear the same interesting relationship to the Gulandi 
that Sigmodon hispidus, 8. and O., does to Rheithrodon alstoni, 
Thos.” 
The only species to be referred to in describing M. humei as new 
is Mus erythrotis, Blyth *, from the Khasia hills, the colours of which 
agree very closely with those of this species, but which is stated to 
be only 57 mm. in length, with a tail 60 mm. long, and a hind foot, 
including the claws, only 1774 mm. long, a difference in size far too 
great to admit of any question as to the specific distinction of the 
two animals. 
1 This type of zygoma-root is figured Ann. Mag. N. H. (5) ix. p. 414, fig. 3 
(1882). 
2 See P.Z. 8. 1880, p. 693. 
8 J. A.8.B. xxiy. p. 721 (1855). 
