94 Journal of Comparative Neurology. 



region. An area of about 5 sq. mm. was then removed from 

 the cortex of the left side of the fore leg region at about a. The 

 wound was then dressed and the animal allowed to recover. The 

 power of abduction of the right fore leg was lost. After some 

 time another portion of the cortex was removed, a little back 

 of d, on the left side. After recovery it was found that the 

 animal was blind in the right eye. These experiments serve to 

 locate some of the motor and sensory regions of the cerebral 

 cortex for the subsequent histological works, 



"It may be of interest to note also one of the series of ex- 

 periments of electrical stimulation upon the Raccoon, Procyon 

 lotor, which has been employed for comparative study. The 

 animal was a male about three-fourths grown. Just enough cur- 

 rent was used to drive the coil. Ether and choloform mixed 

 were the anesthetics employed. 



"Nearly the whole upper surface of the cerebral hemis- 

 phere of the left side was exposed. The loss of blood was very 

 moderate. 



"The electrodes were introduced at point i. Fig, 2, Plate 

 XI, about 9 mm, from the median fissure and a little in advance 

 of the line passing through the anterior angle of the eye. The 

 result was a forward and inward motion of the right fore leg. 



"At point 2, the introduction of the electrode gave an un- 

 defined movement of the right fore leg. 



"At point 3, about 7 mm. from the median line and sep- 

 arated from I by a faint sulcus, the stimulation produced a flex- 

 ion of the pes on the crus and elevation of right hind leg. 



"At 4, a movement of the right hind leg, as at 3, and a 

 slight rotation of the fore leg inwards. 



"At 5, about 3 mm. from the median line, the stimulation 

 produced an extension and divarication of the digits of the right 

 foot. 



"At 6, the fore leg was elevated and flexed, and with a 

 little stronger current the hind leg was also elevated and flexed, 



"At 7, there was an extension of the toes corresponding 

 to the movements produced at 5, of the opposite side. 



