( 232 ) 



TABLE XXIX. 



Systematic Survey of the Evolution of the Skin-coverLig and 

 Nerve System. 



Medullary 

 coverings 



Enveloping 



mem- ( l-Soft medullary fkin Pia mater 



2 ' Central medullary skin AraehwidM 

 R d medull , ry skin , hlra m 



