SPINAL CORD AND MKDULLa'uK CVCLTiSTOMES 



•WILLIAM F. ALI.EK 





C.C.C. 



MX. 



Mo^.L. 

 C.C. 



R.P. 



..^•s.'?So-j MX. 



^' C.C. 

 M.R. 



Nc. 



R7 



C.C, ccMitral canal 



ABBREVIATIONS 



M.L.. inantk' lavfi 



C.C.C, central canal closure, causod M.R., motor or ventral spinal nerve 



by fusion of lateral plates 

 Ep.N., layer of ependymal nuclei 

 F.P., floor plate of the central nervou.s 



system 

 G.C., germinal cell 

 Mar.L., marginal layer 



root 

 Nc, notochord 

 R.P.. roof plate of the central nervous 



system 

 Sp.G., spinal ganglion 

 Sy.P., syncytium of protoplasm 



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