1911] 



Nervous System of Corydalis 



237 



nal ganglia are chiefly grouped in the caudal, cephalic and 

 ventral regions and may be seen to take direct part in the for- 

 mation of commissures as well as diagonal strands. While 

 dorsal cells on the median line and ventral median cells, send 

 fibers through the ganglion dorso-ventrally, as well as associa- 

 tion fibers to different tracts and lateral groups. In both 

 thoracic and abdominal ganglia dark staining masses made up 

 of very minute fibers fused together are chiefly found on the 

 ventral side and associated with a ventral commissure. 



_£l 



Fig- 5- 



Fig. 5. Nerve cells from the central nervous system, (a) Motor nerve cell 

 from the 3d thoracic ganglion, (b, c and d) Association cells from the. same, 

 (e) Cells from the brain. xlOO. 



