104 NAOKI SUGITA 
TABLE 10—Continued 
CORRECTION- NUMBER OF CELLS IN A VOLUME OF CORTEX, 
COEFFICIENT 0.001 mo.3 
~ KERN SEE ae W.D eae Lam. pyramid. Lam. ganglion. ee 
in fresh | on slide 
brain . ~ 
Ob- Cor! | Ob=” |) “Gere ope) cor 
served rected | served rected | served | rected 
grams mm. mm. ; | 
Ni XaVildiee | 1.825) | 14.45") 10:30.) 200) 1" “73 146) |) 53 ras) 20 
ay | alse) ||) shy} nS 220) 147 76 ta 59 42 22 
15829 @/12732)i8 174 70. 130 56 49 21 
| 
N XIX b| 1.962 | 14.60 | 11.20 164 74 120 | 54 45 20 
a | 1.981 | 13.95 | 10.30 176 71 134) 54 48 19 
1.972 (1/1.33)8 TO ale es LOR oN ere Wy 20 
N XX c¢ } 2.015 | 14.30 | 10.20 189 69 140 | 51 49 18 
a | 2.089 |} 14.50 | 10.95 170 74 116 50 44 19 
2.052 (1/1.36)3 180 72 128 51 47 19 
N XXII g | 2.156 |} 14.75 | 10.70 180 69 118 45 45 leh 
Gu 2atS8 7) loads 0s 70 186 67 120 43 46 17 
2.172 (1/1.39)3 183 68 119 44 46 17 
to N XX-XX the Norway shows a slight excess in the area; 
on the average 2 per cent. 
In spite of the fact that an adult Norway brain has a thicker 
cortex (by about 6.7 per cent in the sagittal section) than the 
Albino brain of the same weight, yet between the two a smaller 
difference in the area of the cortex in the sagittal section is found, 
because of the shorter longitudinal diameter of the cerebrum 
(L. F) in the Norway (Sugita, °18). 
O. The area of the cortex in the frontal section. Norway rat com- 
pared with the Albino 
Just as in the case of the sagittal section, table 13 shows rela- 
tions between the cortical area in the frontal section and the 
frontal diameter of the cerebrum (W. D). As a result, we see 
é Cortical area 
that the relative value C/D or ict aii higladiess stands almost 
in a fixed ratio to the frontal diameter W. D, that is, from 0.94 
