Plate III. Reconstruction of the facial, glossopharyngeal and vagus nerve 

 group in the same embryo shown in Plate I, showing the series of motor 

 nuclei of origin and the tractus solitarius. It can be seen how the latter is 

 formed by the sensory roots on entering the marginal zone of the neural tube, 

 analogous to the dorsal funiculi formed by the dorsal roots of the spinal cord. 

 A section of the neural tube is included in the reconstruction to show its 

 relation to these different structures. Ganglionic masses are represented by 

 lighter shading than the fibre bundles, and the point at which the rootlets 

 enter the neural tube is indicated by dark rings. Enlargement about 35 

 diameters. 



