142 NAOKI SUGITA 
TABLE 4 
Giving both corrected and the uncorrected values for the two diameters of the cell 
body and the nucleus respectively, of the granule cells in the lamina granularis 
interna (IV, fig. 6) for several brain weight groups 
CELL BODY NUCLEUS 
BRAIN WEIGHT GROUP 
Corrected On the slide Corrected On the slide 
Ml Ke Me M 
Group Tih(birgh) se. eee 125 (10 x 12) Iv x12 (9 x 10) 
Groupsihlinwge seach) 546 (11 x 18) 12x 14 (10 x 11) 
GroupsVin See cee 15 x18 (12 x 14) 14x15 Ges) 
Groups Vil Valle eee 16 x 20 (13 x 16) 15 x 16 (12 x 18) 
Groupsex oleae ae ee 19 x 21 @5ix 17) 16x19 (13 x 15) 
Groups XUMPEVi.. ies. : 16 x 20 (13 x 16) 15 x 16 (12 x 18) 
Groups XVI and above...... 15 x 20 (12 x 16) 14x 16 (11 x 18) 
The average size of the granules measured on the sections here 
used is given in table 4. In brain-weight Groups II—V, at which 
stages the layer is not yet clearly differentiated, the measure- 
ments were made on the small cells which lie nearest to the lamina 
ganglionaris and the cells were assumed to be the future granules. 
So, in brains weighing more than 1.6 grams (Group X VJ), the 
size of the granules diminishes slightly as the age advances. 
Most of the nuclei of the granules are more or less elongated or 
elliptical in shape and the cytoplasm is very scanty, so that 
sometimes there can be seen only a thin envelope of the cytoplasm 
around the nucleus. 
In short, the granules at the earlier age are almost equal to 
the growing pyramids in size, but they increase in size somewhat 
less rapidly as compared with the pyramids, among which they 
are interspersed at first. They reach their maximum size in a 
grain weighing between 1.2 and 1.4 grams, and after that period 
the size decreases as the age advances, showing a somewhat com- 
pact nucleus. 
As already indicated in a former paper (Sugita, 717 a), the 
lamina multiformis is divided by a pale band (fig. 6,*), poor in 
cells, into two sublayers. The polymorphous cells in the ectal 
sublayer have the shapes indicated by their name, but in general 
they are pyramidal in form, the apex directed ectally, being 
somewhat flattened and rich in cytoplasm, as compared with the 
