DEVELOPMENT OF NERVE-FUJI, 1 K> 



97 





pr, segment 



& 



& ^&' 



neural canal 



FlG. 133.-VENTRAL BOOT OF A SPINAL NEBVE WITH THE SUBBOUNDING 3IESENCHYME IN A 

 BABBIT-EMBRYO OF THE ELEVENTH DAY. (T. H. Bryce.) 



pr.s. 



I ' 134.-PBIMITIVE SPINAL NEBVE-TBUNK IN AN EMBBYO OF LfiPIDOSIBEN PABADOXA 



(Graham Kerr.) 



np., wall of neural canal ; n.t., nerve-trunk ; me*, mesenchyme-cell ; pr.s., primitive sheath 



mi/, myotome. The white bodies are yolk-grains. 

 VOL. I. 



