ZAPUS HUDSONIUS. 
201 
a supply of air. Under this glass was placed a good supply of 
waste cotton. Soon after it was fairly established in its new and 
more commodious quarters, it began to clean every part of its body 
in the most thorough manner, washing itself very much in the 
same manner as a cat washes. On coming to the tail it passed 
that long member, for its whole length, through the mouth from 
side to side, beginning near the body and ending at the tip. At 
night as soon as the lights were put out the mouse began gnawing 
the paper, and during the night it gnawed all the newspaper it 
could reach, and made the fragments and the cotton into a large 
nest perhaps five or six inches in diameter, and established itself 
in the centre. Here it spent the succeeding day. The next night 
it was supplied with more paper, and it gnawed all it could reach, 
and thus spent a large part of the night in work. I could hear the 
work going on when I was awake. In the morning it appeared to 
be reposing on the top of its nest ; but after watching it for some 
time, and seeing no motion, I lifted up the glass and took the 
mouse in my hand. It showed no signs of life. I now felt that 
perhaps my pet was indeed really dead ; but remembering what I 
had previously seen, I resolved to try to restore it again to activity. 
By holding it in my hand and thus warming it, the mouse soon 
began to show signs of life, and although it was nearly the whole 
day in coming back to activity, at last it was as lively as ever, and 
afterward, on being set free in the room, it moved about so swiftly 
by means of its long leaps, that it required two of us a long time 
to capture it uninjured. 
“ On the evening of February 6th I reached my home in 
Williamstown, and on my arrival the mouse was in good condition; 
But the next morning it was again apparently dead ; in the course 
of the day, however, being placed where it was warm, it gradually 
came back to activity as before.” 
The statements of Godman and Thompson, that the Jumping 
Mouse remains torpid till the last of May or first of June, are 
H 
