PLATE 3 
EXPLANATION OF FIGURES 
Figures 9 to 12 show the clear reticulations, Nissl bodies, mitochondria in the 
cytoplasm and in the intracellular axones, and small portions of the tropho- 
spongium. Figure 10 shows the compact portion of the somewhat cup-shaped 
intracellular axon partially encircling the nucleus, a condition observed in but 
few cells. Figure 12 illustrates a section whose plane is parallel with the curve 
of the intracellular axon. Only a relatively small part of the axone appears in 
figure 11. The mitochondria are distributed irregularly throughout the cell 
body; they appear in large numbers in the intracellular axone, with their arrange- 
ment in general parallel with the neurofibrillae. Figure 13 shows bodies that 
possibly are greatly swollen mitochondria. 
Figures 9 to 12 were drawn from A. O. B. preparations, and figure 13 from an 
arsenious acid silver preparation. Magnifications: figures 9 to 12, < 700; fig- 
ure 13, X 866. 
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