
“ oo 

-< 

CONTENTS OF PART XX. 
NTIA (Rodents)— 
Genus Mus A PAGK 











feaee Lhe Elouse Mouse : : : : - 649 f 
_-' The St Kilda House Mouse : f : x LSI 7 
SCIUROMORPHA : : . 665 
-CASTORID& (Beavers) , 3 : ae ate 7 666 
") Genus Castor . . 5 : ; : OO, 
The Beaver 5 F : : : Ser: 
Genus 7vogontherium . : : : : a ty 
ScruRID# (Squirrels and Marmots) : ; : 7683 
Genus Sczurus . . : , : : . 685 
: The British or Light-tailed Squirrel : . 688 


The English local names have been revised in part by Mr W. W. Skeat, 
M.A. (assisted by the late Professor W. W. Skeat), and in part by 
Mr C. M. Drennan, M.A. Lond., late Scholar Emm. Coll. Camb. ; 
the Celtic and Gaelic names by Dr E. S. Quiggin, M.A., Ph.D., : 
Fellow and Lecturer in Modern Languages and Celtic of Gonville 
and Caius College, Cambridge; while a list of Scottish Gaelic 
names has been supplied by Mr C. H. Alston. Much information 
has been taken from Mr G. S. Millers recently published 
“ Catalogue of the Mammals of Western Europe,” the use of the 
MS. and proofs of which before publication was kindly permitted 
by the Trustees of the British Museum of Natural History. 






ILLUSTRATIONS 
FULL-PAGE. 




Skins of British Squirrel—Sczurus leucourus. 
The Field Mouse. (Black and White.) 

( Coloured.) 

FIGURES IN TEXT. 


Diagram of Palate of AZus muralis and Mus musculus. 
Skull of Beaver (half life size). 
Cheek-Teeth of Beaver (14 times life size). 
Cheek-Teeth of Squirrel—Sczwrus vulgaris (x5). 






A, (sO lilan Stir, ~ 
Ea? eee “a 
sx AUG 26 1921 
25311% / 
. sake ij 
tional Mus®*2* 



