44 



A. T. RASMUSSEN 



Number 



Sex 



v — 



NUMBER OF MITOCHONDRIA IN MILLIONS PER CUBIC 

 MILLIMETER OF CYTOPLASM 



M O 



=■0 



Before hibernation. Active and fed 



During hibernation. Dormant. Not fed since early in December 



After hibernation. Awake. Active. Not fed since early in December 



April 3. 

 April 14. 

 April 14. 

 April 15 



56-SIII 

 10-SIV 

 11-SIV 

 13-SIV 



April is 15-SIV <? 37 



:;i 

 34 

 34 

 36 



Average 



Average of all animals 



249 

 266 

 255 

 258 

 253 



256 



258 



thick. Her results showed a variation in the number of mitochon- 

 dria per cu. mm. of cytoplasm from 178 million (in the dorsal 

 motor nucleus of the vagus) to 284 million (in the mesencephalic 

 nucleus of the trigeminus). The final averages of the fifteen 

 woodchucks will be seen to vary between somewhat higher limits 

 or 18b' million (in the motor cells of the ventral horn of the spinal 



