1907. J FROM SAGHALIEN AND HOKKAIDO. 413 



18. Oraseomi's BEDroRDi^ Thos. 



33 from all the localities visited in Saghalien. 



19 from Ochiai, Central Hokkaido. 1200'. 



c^. 1090. $. 1076. Kuchan, 30 miles S.W. of Sapporo, 

 Hokkaido. 



I can find no appreciable difterence between the Saghalien and 

 Hokkaido specimens of Craseomys. 



19. EvoTOMYS AMURENSis Sclirenk, 



59 specimens from Saghalien (all localities visited). 



The type specimen of this species was obtained by Schrenk 

 close to the mouth of the Amur, and I have no doubt that the 

 present series are referable to the same form. It is probably 

 the " Arvicola ritiilus " of Nikolsky. 



From E. onikado, of Hokkaido, Schrenk's sjDecies is distinguish- 

 able by having the pale lateral area rising up much higher over 

 the shoulders, so as to narrow the reddish uj)per colour to an 

 ill- defined band little more than half an inch broad along the 

 nape and withers. In £J. mikado the shoulder area is rarely 

 lighter or higher than the general light lateral colour. In 

 addition the skull, or at least the brain-case, of mikado seems to 

 average rather longer and narrower than in aviurensis, though 

 the difierence is not very great, and the two forms are no doubt 

 very closely allied. 



20. EvOTOMYS MIKADO ThoS. 



29 from Ochiai, Central Hokkaido. 1200'. 



21. SiCISTA CAUDATA, Sp. n. 



$ . 862. 17 miles N.W. of Korsakofi", Saghalien. 150'. 

 1st August, 1906. B.M. No. 7.2.5.104. Type. 



" Among tall grass." — M. F. A. 



A species without dorsal stripe, and with a very long brown 

 unicolor tail. 



Size rather larger than in >S'. concolor Biichn. Fur close and 

 fine ; hairs of back, in a summer specimen, about 6 mm. in 

 length. General colour along the dorsal area pale brown, of a 

 rather warmer tone than Ridgway's " wood-brown," the sides 

 paler and with a slight bufFy suffusion. Under surface pale 

 greyish with a diub suffusion, line of demarcation on sides not 

 strongly marked. Visible part of ears (proectote and metentote) 

 well-haired, dark brown, tipper surface of hands silvery white, 

 of feet similar except that the metatarsals are dusky mesially 

 for their prominent third. Tail very long, well-haired, uniformly 

 brown above and below. Mammae 2 — 2 = 8. 



Skull lightly built, smoothly rounded. A deep concavity 

 present in the single specimen on the median fi-ontal suture just 

 behind the nasals ; perhaps not normal. Palate very much as in 

 S. leathemi, the edge of the mesopterygoid fossa close behind the 

 raised ridge which runs across the palate between the last molars, 



Proc. Zool. Soc— 1907, No. XXYJTI. 28 



