GROWTH OF THE CEREBRAL CORTEX 199 
TABLE 6—Continued 
Be eee | amet 
SERIES, LITTER AND | (Ge. | “vor ee __ | Stand- 
GROUP Teo age | BRAIN Correc- | Corti- |Correc- | Corti- | Corti- | ard for 
WEIGHT| tion cal tion cal cal the 
coeffi- | thick- | coeffl- | thick- | thick- | same 
cient ness cient ness ness brain 
weight 
days grams mm. mm. mm. mm, 
Series IT 
F a, b Abe J |) UBS |) OSA) wa ilze ale) ea TLS Le |) GE 
c-l eh e25 ela 2O4 ele 24 le Si eles 2a eel one OSm else: 
Series IIT 
Gag T. 1,| 11+ | 0.844] 1.14 | 1.55 | 1.24 | 1.89 | 1.72 | 1.63 
h-] QUE OG) PR | a a) AL | ISAS MES OAsy | Ae ISS | LON HE 
Average } Dals| ti— | (ON768| teas | 1467) L2t eae ae Gleliiand 
(Ser. I-III) 4M IG) P= |) Oe) PO ae TEP) I 2 TL BY I) a ery 
Average } C.1y |) °S=" FO. 7001. 10) | 1.36 | 115 | 255.) 14a, ees 
(Ser. I) C. IT} 19+ es TANS |) heey || the ZS es TLS | a see 
to table 6 ¢ (unpublished), which gives comparisons of cortical 
thickness of the underfed with the standard in each section, the 
average cortical thickness in the sagittal section of the underfed 
exceeds the standard on the average by 5.3 per cent and that in 
the frontal section of the underfed on the average by 8.7 per cent. 
8. AREA OF THE CORTEX IN THE SAGITTAL AND FRONTAL SECTIONS 
Following the procedures which have been described earlier 
for the measurement of the area of the cortex in the sagittal and 
frontal sections of the Albino brains (Sugita, 718 b), the data 
for the underfed Albinos were obtained. ‘Table 7 presents in 
condensed form for each group the averaged data on the corrected 
area of the cortex together with the average correction-coefficient 
for each group, in the sagittal and frontal sections, respectively. 
The observed data, as measured on the slides, and the data for 
correction-coefficient for each individual were tabulated in tables 
7a and 7b (unpublished), on the basis of which table 7 was 
made. In table 7 (and in table 7b) the total areas of the 
frontal sections (one hemicerebrum) and the percentage of the 
cortical area to the total area of the section are also entered. 
