4(56 QN MAMMALS PROM KOREA. [May 7, 



pi'actically no stiipe at all, others have it very faint, while in the 

 majority it is well developed. In No. 1126 it even begins on the 

 forehead close to the eyes instead of mei-ely on the posterior 

 crown or nape, 



12. Cricetulus xestor, sp. n. 



c?. 1133, 1140 (young). $.1144. Kim-hoa, 65 miles KE. 

 of Seoul, 300'. 



Allied to, but even larger than, C triton de Wint. 



Size largest of the genus, the type with longer foot and longer 

 tooth-row than C. triton, hitherto by far the largest known species. 

 Fur close and fine; wool-hairs of back about 11 mm. in length, 

 the longer hairs surpassing them by 3 or 4 mm. General colour 

 above between "smoke-grey" and "drab-grey" of Ridgway, with- 

 out the bufiy or clay-coloured tone of C. tritoii. Under surface 

 greyish white, not sharply defined, the slaty bases of the hairs 

 shewing below their white tips. Head like body ; eyes with a 

 narrow darker rim. Ears with proectote black, rim whitish, the 

 remainder bi'own. Upper surface of hands and feet white ; 

 posterior half of soles hairy. Tail long, as in C. triton, the basal 

 ^-| inch grey and furry like the body, the remainder finely 

 haii'ed, brown above, greyish white below. 



Skull very similar to that of C. triton. Supi-aorbital edges 

 evenly divergent, sharply square, no doubt slightly beaded in 

 older specimens. Palatal foramina long, reaching back nearly to 

 the level of the front of m'. Mesopterygoid fossa broader than 

 in C. triton. 



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



Head and body 127 mm. ; tail 71 ; hind foot 24 ; ear 17'5. 



Skull : greatest length 33"6 mm. ; basilar length 28"5 ; greatest 

 breadth 17 ; interorbital breadth 5"2 ; palatilar length 15; diastema 

 10; palatal foramina 7*3; length of upper molar series 5"6. 



Ty2ie. Young adult female. B.M. No. 7.6.3.52. Original 

 number 1144. Collected 19th November, 1906. 



This species is no doubt nearly allied to the C. triton of Shan- 

 tung, but difiers in its greyer colour and larger size. The oldest 

 specimen, the type, is itself barely adult, but the longer tooth-row 

 and hind foot show that old specimens would considerably exceed 

 in size the type of C. triton, which is an aged individual. 



13. Craseomys regulus Thos. 



S . 1135. Kim-hoa, 65 miles N.E. of Seoul, 300'. 



S . 1149. Kaloguai, 55 miles N.E. of Seoul, 500'. 



c?. 1169, 1176, 1181. $.1168,1177,1182,1187,1192,1194, 

 1195. Near Chong-ju, Chung-Oliong Province, S. of Seoul, 800'. 



