60 
VIII. 
MISCELLANEOUS NOTES AND OBSERVATIONS. 
Mammalia. 
By T. Southwell. 
Arvicola glareolus. In my list of the Norfolk Mammalia, read 
before this Society in 1871, I was compelled to omit the Red-field, 
or Bank Vale ( Arvicola glareolus) for want of positive evidence of 
its occurrence in this county, although I thought it probable that 
more careful observation would lead to its discovery, and Mr. 
Gurney had an impression that a Vole found by him in a Kestrel’s 
nest at Earlham, belonged to this species. Since then its claim to 
a place in the Norfolk list has been fully established by Mr. F. 
Norgate, who added to my already great indebtedness to him by 
kindly sending for my examination the first two specimens taken 
by him. On the 29th July last, Mr. Norgate obtained in a pitfall 
at Sparham, an immature specimen which he sent to me, hut arriving 
when I was from home, and having to follow me, it came to hand 
in such a state as to he utterly indistinguishable ; a second, how- 
ever, taken on the 8th of August, also immature, reached me in 
capital condition, and proved without doubt to he Arvicola glare- 
olus. Since then, Mr. Norgate has taken an old male, on the 13th 
August, and an old female with five young, on the 20th of the same 
month. This species differs externally from the common Field 
Vole (Arvicola agrestis) chiefly in its smaller size, longer tail, and 
the decided rufous tinge of the head and back ; it may also bo 
readily distinguished by a dental peculiarity, the molars in the 
adult being possessed of distinct double roots, which is not the case 
in either of the other two British Voles. There are also some other 
anatomical differences. As a British species it was first described 
by Mr. Yarrell, in a paper read before the Zoological Society of 
London, on May 22nd, 1832, under the name Arvicola riparia. 
Mr. Yarrell, however, not being aware that it had already 
been separated by Sclireber, there describes it as a species new to 
science. His paper is valuable for the anatomical comparison 
between this and the closely allied species Arvicola agrestis, which 
