MAMMALIA OF NORTHUMBERLAND AND DURHAM. L¥e 
XII.— A Catalogue of the Mammalia of Northumberland and 
Durham, by Henry T. Mennetz, F.L.S., and Vincent R. 
Perkins, Honorary Members of the Tyneside Naturalists’ 
Field Club. 
Wuey, as secretaries to the Club, and rather to fill up a gap 
which no one seemed inclined to occupy, than from any peculiar 
fitness for the task, we undertook to prepare a catalogue of the 
Mammalia of the district, we expected—by reference to local 
collections, and from the information and assistance we could 
derive from our fellow-members (whom we had always found 
ready and willing to help us)—to accomplish the work with 
tolerable completeness and accuracy. But as 
The best laid schemes 0’ mice and men 
Gang aft aglee ; 
so in our case has it happened that, by sudden and unexpected 
removal to distant localities, our original design was nipt in the 
bud, and we have both been deprived of all those local aids on 
which we had naturally so greatly depended; we would therefore 
willingly have abandoned the undertaking, or transferred it to 
more competent hands; but the fates ruled otherwise, and we 
have been sternly held to our bond. 
We have been compelled to draw largely on what may be 
termed “ Historical Evidences ;” and as ancient writers on the 
history of our island usually commenced their lucubrations at a 
date anterior to the flood, so have we attempted to hide the 
poverty of our matter by copious notices of animals now, alas, 
no longer denizens of our forests and mountains. 
In this catalogue we have adopted the system of classification 
proposed by Professor Owen, with only one exception. We 
have not ventured, in the face of the almost universal dissent of 
scientific men, to give to MAN more than an ordinal rank, and 
consequently have had to omit the class Archencephala which 
Professor Owen has prepared for his reception. 
In this, and other points, we have endeavoured to give expres- 
