ZAI’US HUDSON! US. 
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this animal brings forth its young. But it has been seen leaping 
about with the young ones strongly attached to its teats. Four 
young ones have been seen thus attached.” 
Dr. DeKay says that Mr. Jesse Booth, of Orange County, New 
York, writes him : “In cross-plowing some years since, my atten- 
tion was taken up by seeing some small thing move off from near 
my plough, at about the moderate walk of a man. It went over 
ridges and descended the hollows of the furrows, bearing some re- 
semblance to an old withered oak leaf. 1 pursued it, when it 
proved to be one of these wood-mice, or jumping mice ; a female, 
with four young ones attached by their mouths to its teats.” * 
The Hibernation of the Jumping Mouse. 
Dr. Benjamin Smith Barton, of Philadelphia, was the first to 
make known the fact that the Jumping Mouse hibernates. On 
the .2d of October, 1795, he read a paper before the American 
Philosophical Society (which was not published, however, till 1 799) 
in which he states : “ In the month of February, one of these 
animals was found, seemingly in a torpid-state, under a stone, in 
opening a quarry.” Fie further says, that a farmer, living near 
Philadelphia, has often discovered them, “ at the depth of eighteen 
inches or two feet under ground, when he has been digging for the 
roots of horse-radish and parsley, in the winter-time.” f In a 
supplement to this article, published in 1804, the same author 
observes : — 
“ In the month of August, 1796, one of these little animals was 
brought to me from the vicinity of this city. It was put into a 
large glass jar, where I was so fortunate as to preserve it for near 
four months. Though it made many efforts to escape from its 
* Zoology of New York, Part I, 1842, p. 72. 
f Some account of an American Species of Dipus, or Jerboa. By Benjamin Smith Barton, M. D. 
Transactions of the American Philosophical Society, Vol. IV, No. XII, 1799, p. 122. Barton 
again refers to the hibernation of this species in his Fragments of the Natural History of Pennsyl- 
vania, 1799, pp. xii, xiii. 
