MUS. 



307 



tail varies in length, but it is generally longer than the body and head, although it 

 may occasionally fall short of that length. 



Muzzle to vent 

 Vent to tip of tail 

 Hind foot 

 Height of ear . 



5-45 

 6-15 

 1-11 

 0-80 



The skull is distinguished from the skull of M. sladeni by its shorter muzzle, 

 but in other respects the skulls are much ahke. 



Measurements of shull. 



Inferior border of foramen magnum to tip of premaxillse . . . . 



Tip of premaxillse to anterior end of palate ....... 



Length of palate 



Length of molar line . . . 



Inferior margin of external border of infraorbital foramen to tip of premaxillge 

 Breadth across parietals ........... 



Adolescent $ 



Adult $ 



1-23 



1-43 



0-47 



0-57 



0-30 



0-32 



0-29 



0-28 



0-31 



0-38 



0-61 



0-63 



This is the common house rat at Ponsee, Hotha, and Teng-yue-chow. 



* MuS KAKHYENENSIS, n. S. 



Muzzle moderately deep and short ; ear large and rounded, greatly exceeding 

 the distance between the inner canthus . and the front of the muzzle and also the 

 interval between the external canthus and the lower margin of the external orifice 

 of the ear ; its breadth also exceeding the former measurement. Peet well deve- 

 loped, the hind foot rather long and slender, equalling the length from the front of the 

 lower lip to the anterior margin of the external auditory meatus. Claws well deve- 

 loped, compressed, moderately curved and sharply pointed. The tail is considerably 

 in excess of the length of the body and head ; finely ringed, five rings to the one-tenth 

 of an inch. Eur long, dense, and soft, reddish-brown on the upper parts, with a dark 

 speckled appearance due to the stronger hairs having broad brown tips. Sides of 

 the head dusky- greyish ; chin to vent, and under parts greyish- white, with a silvery 

 sheen. Peet dusky pale brown. Ears and upper surface of tail dark-brown ; under 

 surface of tail pale brown. 



Aged Q 



Tip of snout to vent 2*90 



Vent to tip of tail 3-36 



Hind foot 0-71 



Height of ear 0*55 



Breadth of ear 0*42 



This mouse is distinguished from the common house mouse of Lower Bengal 

 by its relatively shorter tail, longer hind feet, and larger ears ; and from M. homurus 



