GROWTH OF THE CEREBRAL CORTEX 153 
TABLE 7 
Giving the average uncorrected diameters of the nerve cells and their nuclei in the 
lamina pyramidalis and the lamina ganglionaris measured at the fixed locality 
(locality X) on the horizontal sections of the Norway rat brain. The data are 
given for each brain weight group only. This table is comparable with table 2 
LAMINA PYRAMIDALIS LAMINA GANGLIONARIS 
BRAIN WEIGHT | NO. OF | BRAIN Cell body Nucleus Cell body Nucleus 
GROUP CASES |WEIGHT diameter diameter diameter diameter 
Transv.| Longit. Transv.| Longit.|/Transv.| Longit. Transv.( Longit. 
grams L B bb im 7 Me M M 
N XI 3 TOS es 2068F AST 15.4) 2066) e29E3R | 180m) 19.2 
N XIII 1 S43) | LORS TA 15. | 20k 2825 elite Sale Loeo, 
N XIV 5 1.447) 15.4 | 20.6 | 14.4 | 15.3 | 20.8 | 29.0 | 18.4 | 19.7 
N XV 3 e520 Asa le 2Oe2nelasGul los Ie20k 5 p2enonloaen lL OLO, 
N XVI 4 1663/5149) 22050) 13.85) 14.9 | 2020) 2988) i tSesnialOr3s 
N XVII 4 LATA S| 2080) | WSe7 1 V5.0) | 2ZOESN 29F a" Seon) ORS 
N XVIII 2 1.843) 14.5 | 20.2 | 18.8 | 14.7 | 20.2 | 29.4 | 18.0) 19.5 
N XIX 1 95S LOSE ZORSe elas onllons || Zoom ras orm One meo Ore 
N XX Ps PAV ss) MEG) | PRES) ESA a Bree 3 is) WEBLO Alssatst |) IR 
N XxI 2 ZOO 147 || 2089") 1368) 14.4 | 238.0) 29245) 188319200 
N XXIII 1 2340| 1520) |) 2028) 13-4 | 14.0 | 2528 || 32201) 184s get 
1 See note on table 6. 
The results of the measurements are presented in tables 6 and 
7 arranged in the same way as in the corresponding tables 1 and 
2 for the Albino. Chart 2 shows graphically the data presented 
in table 8 which gives the average diameters of the cell bodies 
and the nuclei for each brain-weight group, corrected for the 
fresh condition of the material, by multiplying by the correction- 
coefficient for the group, which is cited from my previous paper 
(Sugita, 718 a) and explicitly given in table 8 also. Charts 3 
and 4 show some comparisons in cell sizes in the two forms. 
Chart 3 was plotted according to the actual brain weights of the 
two forms, and chart 4 was plotted, using the same data for 
the Norway, but entering these according to the brain weights 
reduced by 18 per cent, which presumably correspond to the 
brain weights-of the Albino at the same age (see Sugita, 718 a), 
while the data of the Albino were plotted according to the actual 
brain weight. 
