550 PROEESSOR MARSHALL ON THE BRAIN OE A BUSHWOMAN; AND 
tions indicative of the manifold conditions of the muscles, such a deficiency of these com- 
missural fibres may be equally supposed to interfere with the functions of the organ. 
In both idiots the inferior and superior peduncles likewise appear small ; but no exact 
computations could well be made concerning these parts. 
On counting the total number of laminae in the cerebellum of an idiot, Malacarne 
found that they numbered only 324*, whilst in a healthy cerebellum there were from 
700 to 780. In another case he found 362 laminae, 240 on the upper surface, and 122 
on the under surface^. It appears that he afterwards met with a third example, in 
which a similar deficiency in the number of the laminae was likewise noted $. 
For reasons already stated in describing the cerebellum of the Bushwoman, I have 
limited myself to counting the superficial laminae only of certain parts, and the deep and 
superficial ones of others. The following are the results. 
Superficial laminae only counted. 
Median 
portion. 
Lateral parts. 
Total 
la.minfp in 
Superior 
vermiform 
process. 
Square 
lobe. 
Posterior 
superior 
lobe. 
'Amygdala. 
Biventral 
lobe. 
Slender 
lobe. 
Posterior 
inferior 
lobe. 
lateral 
parts. 
Healthy brain 
18 
21 
13 
9 
6 
5 
16 
70 
Idiot woman 
15 
14 
9 
7 
7 
4 
12 
53 
Idiot boy 
19 
14 
11 
5 
7 
4 
12 
53 
Superficial and deep laminae counted. 
Median portion. 
Lateral parts. 
Inferior 1 • -n ■ i 
—*»•» v td T S ,a 
process. J 
Nodule. 
Amygdala. 
Floccule. 
Healthy brain 
37 
= 28 
+ 
9 
21 
18 
Idiot woman 
25 
= 17 
+ 
8 
18 
8 
Idiot boy 
20 
= 15 
+ 
5 
11 
11 
The preceding numbers confirm the interesting observations made by Malacarne 
eighty years ago ; and it is to be noted that when both the superficial and deep laminae 
are counted, the difference between the healthy and idiots’ cerebellum is greater, and 
approaches more nearly the proportions shown by Malacarne’s. numbers. The total 
number of superficial laminae counted is the same in both idiots, and their distribution 
in the several lobes is equal, with the exception of the posterior superior lobe, which 
has two more laminae in the idiot boy, and of the amygdala, which has two less. As 
compared with the healthy cerebellum, the greatest deficiency is in the square lobe ; the 
* Op. cit. p. 7. t P. 226. 
X C. Bonnet, Palingenesie Philosophique, part 2, chap. iv. vol. vii. of his collected ■works in 4to. 
