TABLE VI. 



Systematic Survey of the principal organs of the ideal Primitive Vertebrate, 

 the hypothetical parent-form of Vertebrates, and of their development 

 from the germ -lay era. 



Coeloma, or Body-cavity. A space between the body-wall and the 

 intestinal wall, between the exoderm and the entoderm, filled with lymph 

 (colourless blood). 



9. Female sexual glands (Ovary"). 



10. Kndocoelar, or Visceral Co3- 



lom-epithelium (the outer 

 cell-covering of the intestinal 

 tube.) 



11. Principal blood-vessels (primi- 



tive artery or dorsal vessel, 

 and the primitive vein or 

 ventral vessel). 



12. Mesentery. ' 



13. Muscular intesMne wall (fi- 



brous intestinal wall). 



(u. Intestinal epithelium (ttinel 

 Intestinal-glandular layer cell-covering of the intestinar 



(Mucous stratum, Baer), tube). 



or 1 15. Intestinal glandular epithe- 



Mucous layer. lium (liver-cells and other 



Lam no, mycogastralit H \ intestinal glandular cello). 



