402 C. JUDSON HERRICK 



Fig. 15 Section 340, between the lateralis and the second roots of the vagus. 



Fig. 16 Section 365, at the level of the fourth root of the vagus. The somatic 

 sensory, visceral sensory and motor components of this root are distinguishable. 



Fig. 17 Section 390, at the level of the seventh root of the vagus and the most 

 rostral rootlets of the first spinal nerve. In this figure and figure 18 the neurones 

 which are supposed to give rise to ventral root fibers {col.v.) are darkly shaded, the 

 other neurones of the marginal zone of the gray substance are drawn in outline 

 only. 



Fig. 18 Section 410, at the level of the commissura infima Halleri. The 

 somatic component of this commissure {com.i.s.) is seen to be related to the 

 region of the spinal V root (r.V.) and fasciculus dorso-lateralis of the spinal cord 

 if.d.l.). The visceral component {com.i.v.) is related to the fasciculus solitarius 

 (f.sol.) and to the commissural nucleus of Caja! in the mid-dorsal region. The 

 strong lateral eminence produced by the spinal V root has been e.xaggerated by 

 shrinkage of the specimen during preparation. 



