Miscellaneous Facts in Zoology. 309 
Asplenium. 
1. Ebeneum, Willd. Rocks, July. 
Peet Melanocaulon, Wille. On the sides of rocks, July. 
Auli L. In woods, July. 
Adiantu 
Pedatum, L.. Wet places, July. 
hcksonia. 
Pilosiuscula, Willd. Wet woods, Aug. 
ZOOLOGY. 
? —_—— 
Arr. VIIL.—Fragments relating to the history of Animals. 
Extract ofa letter to the Editor, dated 
Princeton, Dec. 22d, 1821. 
Dear Sir, 
Tue following are the extracts from my notes on Natural 
History, mentioned in my last to you. ou have my 
consent to dispose of them as you think proper. My en- 
gagements would not ae to ie them befo 
ours 
JACOB GREEN. 
Curious Instinct of the common Hog, (Sus Scrofa—Lin.) 
tis customary with farmers who reside in the thinly set- 
ase tracts of the United States to suffer their hogs to run at 
large. These animals feed upon acrons which are very 
undant in our extensive forests, and in this situation they 
often become wildand ferocious. A gentleman of my acquaint- 
ance, while travelling, some years ago, through the wilds of 
Vermont, spemqot ata little distance before him a herd of 
swine, and his attention was arrested by the agitation they 
exhibited. .-He: peat perceived a number of young pigs 
in the centre of the herd, and that the hogs were arranged 
about them in a conical figure, having their beads all turned 
i i At ae apex of this — cone,a huge 
