156 JoURNAL OF COMPARATIVE NEUROLOGY. 
EXPLANATION OF THE FIGURES. 
PIGAWE Sve 
The following figures are free-hand drawings, using Zeiss Oc. 4 x obj. 1-12. 
Fig. 1.—Cross-sections of the ventral root nerves of the cat, showing dis- 
tribution of neurokeratin. 
‘ig. 2.—Longitudinal section of the ventral root nerves of the dog, show- 
ing form of cones. 
Fig. 3.—Largely magnified drawing of a single nerve-fiber taken from the 
preparation used for Fig. 2, showing the meshwork in the cones. 
Fig. g.—Same as Fig. 3. 
Fig. 5.—Enlarged view of a cross-section of a single nerve-fiber taken from 
the preparation used for Fig. 1, showing neurokeratin framework. 
fig. 6. Cross-section of ventral root nerve of human spinal cord. PAL- 
WEIGERT. Largely magnified. Showing masses of medullary substance in- 
cluded in neurokeratin framework. 
