186 JOSEPH DUERSON STOUT 



tending from the median line to the outer end of the crucial 

 sulcus and from the end of the fissura lateralis to a line 0.5 cm. 

 anterior to the crucial sulcus. The fore limb movements were 

 from an area with the same antero-posterior boundaries, but 

 lying in the outer half of the motor field. The trunk and tail 

 movements were from a narrow strip of the cortex, extending 

 within the posterior part of the hind limb area. The head and 

 neck movements were obtained from stimulations within a tri- 

 angular area lying close to the median line, its apex at the inner 

 end of the crucial sulcus and its base on a line 0.5 cm. posterior 

 to the upper end of the olfactory lobe. 



Cat 12, right hemisphere. All reactions were obtained from 

 a crescent shaped area, about the sulcus cruciatus, the horns of 

 the crescent extending forward. The area about the crucial 

 sulcus, when stimulated, gave movements of the hind limb. The 

 base of the outer horn gave movements of the fore limb. The 

 portion of the 'field lying internal to the anterior end of the 

 coronal fissure and the portion lying between the median line 

 and the upper end of the fissura rhinalis gave movements of the 

 head and neck. 



Cat 14, left hemisphere. The extent of the stimulable area 

 was almost identical with that of the field for cat 11, except at 

 its inner boundary, which did not reach quite to the median line. 

 The fore limb field extended from the middle third of the coronal 

 fissure almost to the median line, and from a line half way be- 

 tween the anterior end of the fissura lateralis to a line 0.5 cm. 

 above the upper end of the olfactory lobe. The area for the 

 head and neck movements did not reach the median line, but 

 was limited to an area about the superior end of the fissura 

 rhinalis. The hind limb field, and that for the trunk and tail, 

 had almost exactly the same location as the same fields in 

 cat 11. 



Cat 15, left hemisphere. The motor field was along the cru- 

 cial sulcus, extending from the median line almost to the coronal 

 fissure. Movements of the hind limb were from stimulations 

 applied to the inner four-fifths of this field and movements of 

 the fore limb from stimulations applied to the outer four-fifths 



