404 MR. OLDFIELD THOMAS ON MAMMALS [Apr. 23, 



2. The Duke of Bedford's Zoological Exploration in Eastern 

 Asia. — IV. List of small Mammals from the Islands of 

 Saghalien and Hokkaido. By Oldfield Thomas, F.R.S., 

 F.Z.S. (With Appendix on the Cold-))looded Verte- 

 brates, by G. A. B0ULENC4ER, F.R.S., F.Z.S.) 



[Received March 21, 1907.] 



Whatever may be the riches of the »St. Petersburg Museum in 

 collections from the far-eastern island of Saghalien, our own 

 National Museum has hitherto possessed scarcely a single mammal 

 from it, so that the results of a visit made to the island by 

 Mr. M. P. Anderson during last summer, presented to the Museum 

 by our President, are of the greatest value, and include examples 

 of a considerable number of species and subspecies new to science. 



Mr. Anderson also paid a second visit to the island of Hokkaido 

 (formerly known as Yesso), and added a number of species to 

 those he had previously obtained theie, a list of which was given 

 in my paper on his Japanese Mammals ■•*•". 



The result of the present important collection is to show that 

 the two islands are exceedingly closely allied in their small 

 mammal faunae. For nearly all the same species are represented in 

 both, although in the case of the /Sciurus, Micromys speciosus, and 

 Evotomys a slight difterence, here considered of subspeciflc value, 

 is perceptible. The Saghalien species (apart from Bats) as yet 

 unrecorded from Hokkaido — Sorex daphcenodon and minutus, 

 Sciuropte7^us russicu^, and Sicista caudata — will probably yet turn 

 up in the more southern island. Bvit the one Hokkaido species 

 absent from Saghalien, Micromys geisha, is so common and so 

 easil}'- caught when present, that we may take it for granted that 

 it really does not occur in the latter island. Moreover, it should be 

 noted that the form of M. speciosus which occurs in Saghalien is 

 allied to the Korean peninsulce, while that of Hokkaido is nearer 

 to the typical form fovmd in Japan ; so that in this genus, and 

 this genus only, Hokkaido would seem to be more allied to Hondo 

 than to Saghalien, a result probably due to the comparatively 

 recent immigration of the species concerned. 



The forms found in each island are as follows : — 



Saghalien. 



My Otis mystacinus. 



Sorex unguicidaUis, daphcenodon, shinto saivus, 



minutus, gracillimus. 

 Sciihropterus rttssicus athene. 

 /Sciurus vulgaris rupestris. 

 Tamias asiaticus. 

 Mus norvegicus. 



* P. Z. S. 1905, ii. p. 333. 



