132 



Drs. Mott, Schuster, and Halliburton. 



[Oct. 20, 



to differentiate its subdivisions much more thoroughly than was possible in 

 the case of the limb movements. Since in catching insects a quick play 

 of mouth and tongue must be required, this may be an explanation of the 

 large cortical representation of the tongue, mouth, and face. Stimulation of 

 the occipital region gave wholly negative results, although this portion 

 of the brain was well exposed and explored as thoroughly as possible with 

 currents of the usual strength, as well as with currents which were some- 

 what stronger. There is no doubt from histological examination that the 



Fig. 7. — Left Hemisphere of Marmoset. Mag. 3 5. 



F.S. Fissure of Sylvius. 1. Deviation of head and eyes to opposite side. 2. Opening of 

 eyes. 3. Eye movements. 4, 4. Eye and face movements. 5. Deviation of head. 

 6, 6. Fate movements. 7, 7. Jaw and face movements, inchiding right-sided 

 deviation of mouth. 8, 8. Tongue movements. 9. Extension of wrist to opposite 

 side. 10. Extension of wrist and flexion of arm. 11. Movements of opposite leg. 

 12. Flexion of opposite hip and kn(;e. 



visual area is situated at the occipital pole as in other animals. A similar 

 negative result was obtained on stimulation of. the corresponding region of 

 the brain of the Lemur,* and in Ijoth cases this is probably due to the distance 

 separating the solitary cells of Meynert in the ])arts stimulated. 



No portion of the cerebral cortex when stimulated give any movements of 

 the external car ; this is in striking contrast to what was found in the Lemur, 



♦ Mott and f lallibui ton, lor., ci'f.-, p. 140. 



