Vole from the Lower Yang-tse-hiang. 1G7 



Acting on the suggestion of Mr. Howell, I propose to 

 call it 



Microtus calamorum, sp. n. 



Size comparatively large (iiind foot attaining 23 millim., 

 s. u.). General colour above dark brovvn^ of about the same 

 intensity as in European M. agrestis^ but more heavily lined. 

 Sides of nose, rump, and hips with a slight fulvous suffusion. 

 Under surface whitish, the bases of the hairs slaty. Ears 

 fairly long, not entirely hidden by the fur, dark brown. 

 Hands pale greyish, feet dull brown above. Tail more than 

 twice the length of the hind foot, blackish brown above, 

 white below. 



Lateral glands apparently present. Mammas 2 — 2 = 8. 

 Sole-pads only 5 ; hinder part of sole hairy. Claws of hind 

 feet longest. 



Skull large and powerful, rounded above, unusually high, 

 cylindrical, and unflattened ; the height from the molar 

 surface to the vertex nearly equal to the breadth of the brain- 

 case. Ridges and angles of brain-case but little marked. 

 Interparietal of medium size, its hinder edge straight, directly 

 transverse, its anterior also but little bowed, except for the 

 median projecting point. Anterior edge of zygoma-root 

 concave. Palatal foramina contracted behind. Pits on each 

 side of hinder palate deep and well defined, the opening of 

 the posterior nares narrow, sharply V-shaped. Bulke of 

 medium size. 



Incisors strongly thrown forward, visible from above. 

 Molar pattern essentially as in M. arvalis, but mi more 

 simple. M^ with the usual live spaces and without any 

 posterior extra projection, m^ with four and ni'^ with four 

 spaces and a posterior c, all these teeth being exactly as 

 figured by Blasius* in M. arvalis. xl/j with six spaces 

 and a simple anterior triangle, as figured by Blasius (p. o59) 

 in M. nivalis^ but the outer anterior angle rounded and the 

 antero-internal edge slightly hollowed, so as to produce 

 an indistinct extra angle. 



Dimensions of the type (measured in the flesh) : — 



Head and body 127 millim.; tail 5o ] hind foot (s. u.) 21 ; 

 ear 14. In a larger specimen these measurements are respec- 

 tively 139, 53, 23, and 11. 



Skull: basilar length 26*1 ; greatest breadth 17; breadth 



* Sjiu-. Deul^clil. p. -i:'.). 



