236 



THEODORE H, BULLOCK 



Fig. 4. The inner border of the giant cell is often difficult to trace, so complex is 

 the glial interdigitation. The axon emerges at lower right. Calibration: 100 micra. 



Fig. 5. Sometimes the whole inner side of the giant cell appears spongy. The 



increase in surface may be of the same nature as that in glial-penetrated large 



axons. Calibration: 100 micra. 



