264 THE ZOOLOGIST. 
a name (in the form Ursus tawus) originally based on the American Badger. 
Since my list was published Dr. Collett has brought out a most interesting 
contribution to our knowledge of Norwegian Mammals (Nyt Mag. Naturvid. 
xxXvi. p. 264, 1898), and in this he has adopted, quite independently, all 
the nomenclatural principles advocated in my list. He thus lends the 
weight of his authority to Scomber-scomber names, such as Meles meles, 
Lemmus lemmus, &c., and uses Lepus timidus for the variable Hare, and 
** Putorius nivalis” for the Weasel. My unfortunate discovery of “* Neomys” 
as being earlier than “ Crossopus”” was not known to him, but from his con- 
sistent obedience to nomenclature rules he would evidently have used it had — 
he known of it. In one instance, however, he has adopted a change from 
the current term which, probably as much to his pleasure as my own, I am 
able to show is not necessary. This is the name of the Common Vole, 
Microtus agrestis of my list, whose specific name has been used from time 
immemorial. This animal does not occur in the tenth edition of the 
‘Systema Nature’ (1758), but does, under the name of “ Mus gregarius,” 
in the twelfth (1766). On this basis Dr. Collett has called it “ Microtus 
gregarius,” but he has overlooked the important fact that, although the first — 
edition of the ‘ Fauna Suecica’ (1746), in which the name “‘ Mus agrestis ” 
occurs, is pre-Linnean, and therefore invalid; the second edition (1761) is 
after the standard date 1758, and may therefore be accepted as a valid 
post-Linnean work. Mus agrestis occurs on p. 11 of this edition, and will 
afford a sound basis for the use of the familiar term Microtus agrestis for 
the Common Vole.—OLpFIELD THomas. 
The Insectivora and Rodentia of Northumberland.—As the occur- 
rence in the North of England of some of the under-mentioned species of 
Mammalia does not seem, so far as I can trace, to have been hitherto 
recorded in ‘ The Zoologist,’ I think the results of a fortuight’s trapping in 
Northumberland, in January, 1895, may be interesting :—1. Mole (Tulpa 
europea). 2. Common Shrew (Sorea vulgaris). 38. Pigmy Shrew (8. 
pygmaus). 4. Water Shrew (Crossopus fodiens). 5. Squirrel (Sciwrus 
vulgaris). 6. House Mouse (Mus musculus). 7. Wood Mouse (M. sylva- 
ticus). 8. Water Vole (Arvicola amphibius). 9. Field Vole (A. agrestis). 
10. Bank Vole (A. glareolus). Nos. 2, 3, 7, and 10 were caught in the 
same hedge-bank, and seemingly using the same runs. I have in my 
possession the skins of all the above except those of No. 5, which, I may 
add, were shot, not trapped.—Joun H. Trxspave (St. Margarets, West 
Dulwich, 8.E.). 
AVES. 
Immigration of the Song Thrush.—A remarkable recent immigration 
of the Song Thrush (Twrdus musicus) seems worth recording. How far it 
