1908. | Minute Structure of the Nervous System. A19 
By similar researches on the spinal cords of Amphioxus and Myxine, 
I could also trace the condition of their central nerve-cells and the several 
paths of the cell processes. Still more beautiful and instructive pictures 
gave the nervous system of the Hirudines (fig. 2), where also Biedermann 
had studied them with success, and especially in that of a polychet annelid 
(Nereis diversicolor). 
Fig. 2.—A Ganglion of the Ventral Nervous Chain of Hirudo, showing the black stained 
unipolar nerve-cells with their processes. The figure below shows a part of such a 
ganglion with a nerve-cell and its processes. 
