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neurochord and neither are fibrillar. Both are composed of a finely 
granular, almost homogeneous substance. These giant cells are several 
times as large as the small cells of the nerve cord and there are no 
cells which form a gradation in size or structure between the two 
kinds. 
The giant cells are usually not spherical, but are elongated 
(Figs. 7—11) in one axis, which however does not correspond with 
the place of emergence of the nerve fibre. Sections cut perpendicular 
to this axis are circular. The long diameter of the cell varies from 
30 u to 52 u, the shorter diameter from 20 u to 40 u. The longest 
cell which I have measured had a long diameter of 52 u and a short 
diameter of 28 u. 
The nucleus of these cells (Figs. 3, 9—11) is large and distinct; 
its size varies directly with that of the cell and, like the cell, it has 
unequal axes. Its long diameter varies from 11 u to 20 u, the short 
diameter from 8 u to 12 u. In sections perpendicular to the long 
Figure 7 shows sphere, central corpuscle and radiations, (vom RATH preparation.) 
Figure 8 is a section which cuts both the sphere and the process of the cell. 
(Corrosive sublimate followed by iron haematoxylin.) 
Figures 9 and 10 show the excentrie position of the nucleus and the flattening of 
the nuclear membrane on the side toward the sphere. (vom Rats preparations.) 
