10 
Fig. 3. Fig. 4. 
Figs. 3 and 4. Reticulum of the Zona fasciculata. Fig. 3, by SPALTEHOLZ’ me- 
thod. Fig. 4, by MArr’s method. Magnified about 120 diameters, 
earlier view held by Ecker, GERLACH, HENLE and others, that the 
cell columns of the Zona fasciculata are composed of “Schläuche” 
surrounded by a homogeneous membrane was finally disproved by 
ARNOLD who showed that structures which these investigators had 
mistaken for the membranes are in reality the walls of the capillaries 
which define so sharply the cell columns of the middle cortical zone. 
While ArnoLp’s view of the arrangement of the interstitial tissue of 
the Zona fasciculata is, in general, correct, he has, nevertheless, 
mistaken the wavy fibrils of reticulum for a meshwork between the 
parallel processes. 
The fibres of the Zona reticularis (Figs. 5 and 6, Z. R.) are con- 
tinuous with those of the stratum above which on reaching the inner 
cortical layer branch and anastomose to form a dense meshwork of 
reticulum. All of those capsular processes (Fig. 6, d) which have not 
Fig. 5. , Fig. 6. 
Figs. 5 and 6. Reticulum of the Zona reticularis. Fig. 5, by SPALTEHOLZ’ method. 
Fig. 6, by Maxu’s method. d septum reaching from the capsule to the Zona reticularis. 
Magnified about 120 diameters. 
