144 NAOKI SUGITA 
TABLE 5 
Giving the cubes of the average diameters of the cell bodies and of the nuclei of both 
the pyramids (lamina pyramidalis) and the ganglion cells (lamina ganglionaris) 
at birth, 10 days, 20 days and 90 days, the ages indicating respectively the begin- 
ning of each developmental phase. The values given represent merely the rela- 
tive volumes of the cell bodies and of the nuclei. Ratios based on the initial value 
taken as unity are given for each column. The data, on the basis of which the 
calculations were made, were taken from table 3 
PYRAMIDS IN THE LAMINA GANGLION CELLS IN THE LAMINA 
PYRAMIDALIS GANGLIONARIS 
AGE INDICATING 
THE BEGINNING OF LOAVES Cell body Nucleus Cell body Nucleus 
EACH WEIGHT 
DEVELOPMENTAL GROUP oe = a ae 
SUNeue ba TA) ae a 
B53 z= 25 zs BS Z| 25 $ 
Sei serines Woe age: a) ee yee 
3 3 3 B33 
Birtheeeeernee ee Jit PANSY WU (0.0 119 | 1.00 675 | 1.00 330 | 1.00 
MO CPR o me 05 0 XO | TSS) | 5 775 | 6.50 | 2925 | 4.33 | 1440 | 4.86 
AWCENippaoss bee GL || assy || @ 790 | 6.63 | 8070 | 4.55 | 1415 | 4.29 
S0vdaySee sees cee OV LT 4) 70) |) oe A4: 665 | 5.58 | 35380 | 5.23 | 1490 | 4.52 
| 
lamina granularis interna and the lamina pyramidalis) (see fig. 
6). At earlier ages, neuroglia nuclei are comparatively scarce 
-in the lamina pyramidalis, but at maturity they are well distrib- 
uted in this layer, though in the lamina multiformis they are found 
always abundantly. With the method of staining here used, 
we can distinguish two kinds of the neuroglia nuclei, one staining 
a relatively deep blue, which is the smaller in size (2 to 5 micra 
in diameter on the slide), with crowded granules in the chromatin 
sometimes arranged radially (‘Radkern’), and surrounded by 
evident cytoplasm, and the other staining rather paler and with a 
violet tone, vesicular (‘blasig’) in appearance, somewhat larger in 
size (3 to 6 micra in diameter on the slide), with seanty chromatin 
and enveloped by a small amount of cytoplasm. This meta- 
chromatism in the staining of the two kinds is very remarkable. 
Both kinds are found intermingled. In the white matter gha 
cells are distributed in rough chains, while in the cortex they are, 
under normal conditions, less well distributed than in the white 
matter. Sometimes, especially in old age, the glia cells are 
found gathered around the ganglion cells or the pyramids or near 
the blood-vessels. The satellite cells which are attached to or 
