458 



G. RYLANDS DE BEER 



one of Balfour's eight somites the following relations will result, 

 as shown in Table I (ventral roots also included). 



This is the theory which has grown out of Balfour's work, 

 and the somites bearing the relations described above may be 

 called Balfour's somites. Among the supporters of this view 

 are Ziegler (19), Koltzoff (10), Goodrich (8). 



But the majority of authors have followed Van Wijhe (18) 

 in the interpretation of the relations. He regards the facial 

 nerve as really of double nature, the existing nerve being 

 related to the fourth somite while the nerve of the third somite 

 has either disappeared or become merged with that of the 

 fourth. The relations of these somites (Van Wijhe's somites) 



