174 



Journal of Comparative Neurology. 



centre directly through the vagus roots or indirectly- 

 through the fasciculus communis from the IX or VII 

 roots, 



\ use the terra coiinmims system in preference to the "fasciculus 

 communis system," proposed by Strong and subsequently employed 

 by Allis, Kingsbury and myself because the system contains many 

 fibres which do not enter the fasciculus communis in the strict sense 

 of that term. Moreover the non-committal character of the shorter 

 term relieves it of the ambiguity which has of late arisen regarding 

 the morphology of the fasciculus communis — see the account in 

 Section 3. 



Text-Figure 5. 



Text-Figure 5. — A diagrammatic view of the sensory components 

 of the cranial nerves of Menidia, as seen from the right side. The 

 diagram is based upon the projection of the cranial nerves upon the 

 sagittal plane which is given in detail on figs. 3 and 4. The general 

 cutaneous component is indicated by the unshaded nerves, the com- 

 munis component by cross-hatching and the acustico-lateral is drawn 

 in black. For the significance of the reference letters see the table 

 of abbreviations at the end of this article. 



(3). The acustico-lateral system innervates the lateral 

 line organs and the internal ear. Its fibres are for the 

 most part very large, the coarsest in the body, and they 



