NERVOUS SYSTEM IN GONIONEMA MURBACHII. 



narrow nervous strand, peripheral to the above, around the 

 margin ; a definitely outlined radial system along the radial 

 canals, both below the epithelial cells of the subumbrella as well 

 as deeper beyond the muscle layer, in the flat epithelial endo- 



G 



FIG. I. Schematic view of a piece of the marginal nerve rings. Drawn from a 

 study of many specimens studied with an oil immersion as well as lower power and 

 camera lucida both from the sub- and ex umbrella sides. 



A, cells, transversely to the upper marginal ring. 

 J3, ovoid cells with sheathed fibers. 



C, nerve fibers parallel to the marginal ring. 



D, multipolar cells proximal to the lower ring cells. 



E, communicating fibers between the rings. 



F, ovoid cells in the marginal strand. 



G, multipolar cell of the subepithelial network. 

 //, muscle fiber. 



/, space bet%veen upper and lower ring. 



