Mr. Brooke on Conchology, regarded as a Science. 207 
white ; in front and at the tips of the ears they are ochry ; in the winter 
the fur is about half an inch longer than the tips of the ears, forming a 
kind of pencil; in summer these hairs are short and adpressed both on 
the ears and round the eyes, giving these parts rather a light ash-colour 
than pure white.t+ 
This Squirrel is not common in the district. I have seen them in 
New York, and a grey Squirrel is said to be more common in the 
more southern settlements of Canada, and to be very like that which I 
have described. The size of the Sciwrus magnicaudatus, as given by 
authors, is very different, as well as the proportion of the body and tail, 
and the fur of the only specimen of the Carolina Squirrels which I have 
seen, is very unlike this, and the ears are of the same colour as the back. 
Pteromys volucella. Common Flying Squirrel. 
Head and body nearly six inches, tail rather more than four. 
(68.) Lepus Americanus (Erxleben.) American Hare. 
Feet large in proportion to the size of the animal. 
(77.) Cervus leucurus (Douglas.)* Long-tailed Deer. 
Nore. 
For the representation of the five new species of Mammalia, described 
in the preceding paper, the proprietors have to acknowledge their 
obligations to Dr. Gapper who has kindly given to them the use of 
the plates which he had prepared for another work. With equal libera- 
lity Dr. Gapper has presented to the Bristol Museum specimens of each 
of the new species above referred to. 
Art. XXXII. On Conchology, regarded as a distinct branch 
of Science. By Henry James Brooke, Esg., F.L.S., 
M.G.S., &c. 
Tue attention of naturalists having been recently drawn to the general 
subject of systematic classification, the editors of the Zoological Journal 
+ “ This animal seems to belong to some of the varieties, as they have bcen 
“ termed, of the Sciurus cinereus, but I think the shape of its ears is a sufficient 
“ mark to distinguish it from the live ones in the Zoological Museum.—J. R.” 
