196 NAOKI SUGITA 
the controls from the same litter, and it gives for each group, 
underfed and controls, the average brain weight and the cor- 
rected cortical thickness in the sagittal and frontal sections of 
the brain, together with the average thickness. The data for 
obtaining the correction-coefficient are given in the full table for 
each individual, but in the condensed table 6 only the average 
values of the correction-coefficients for each group appear. 
The application of the correction-coefficient was made in the 
way formerly described (Sugita, 17a). The horizontal sections 
of underfed brains were not prepared for this study. 
Table 6 shows also a comparison of the average thickness of 
the cortex in the underfed young with that for the standard 
Albino of the same brain weights. As the present study was not 
extended to the horizontal sections, the average thickness of the 
cortex was determined from only the two kinds of sections from 
the same individual and it was compared with the corresponding 
average for the standards. In the standards, these values 
proved to be within 0.5 per cent of the general average thickness 
of the cortex based on the three kinds of sections. Here, in table 
6, the standard values were obtained from the somewhat smoothed 
curve based on the data formerly presented (table 9 and chart 
9, Sugita, ’17a). 
Table 6 a (unpublished) for the sagittal section showed for the 
underfed that the cortical thickness at the frontal pole (locality 
I) is evidently very much greater than that of the controls or 
the corresponding standard value for the same brain weight, 
comparison having been made on the basis of the data given 
formerly (table 6 and chart 4, Sugita, ’17 a). Locality IT was 
the next which exceeds in the cortical thickness on the side of the 
underfed. Localities III and IV stand in general slightly in 
favor of the underfed, but at locality V, the occipital pole, there 
was found no notable difference in the cortical thickness between 
the underfed and the standard. Asa rule, the cortical thickness 
of the normal Albino diminishes from the frontal to the occipital 
pole—from locality I to locality V—and the cortex at the frontal 
pole increases most rapidly in the early age. This is also just the 
order of the excesses in the cortical thickness of the underfed 
