The Motor Ganglion Cells of the Frog's Sjnnal Coad. 73 



Table XIV.— Continued. 



If we consider the tables, or better, the plates, we shall see 

 that the cells are arranged in two great groups, correspond- 

 ing to the brachial and lumbar enlargements, which are con- 

 nected by the slender dorsal region. We can then divide the 

 spinal cord into three regions — ^one for the lst-3d nerves, 

 the second for the 4th-6th nerves, and the third for the 7th- 

 10th nerves. We will consider each separately: 



TABLE XV. 



The length of this region does not correspond to the num- 

 ber of cells, as seen by 



