GROWTH OF THE FETAL CENTRAL NERVOUS SYSTEM 441 
The absolute height of the vermis cerebelli when calculated for 
age in fetal months (fig. 31, curve IJ) rises in practically a straight 
line from 0.23 em. at the beginning of the fourth month to 2.1 cm. 
at birth. 
30 
cm. 
ED 
£0 
O 5 10 15 £0 25 30 a}, AO A5 5O 55cm. 
Fig. 13 Field graph and curve of the growth of the cerebellum in fetal life 
as shown by the vermis cerebelli height. Abscissa: total body length in cm. 
Ordinate: vermis cerebelli height in em. Individual cases indicated by solid 
dots. Curve drawn to the formula: Y = 0.01 (X!-37). (Data from tables 21 
and 22.) 
The percentage increment of the vermis cerebelli height when 
calculated for 5-em. intervals of crown-heel length (fig. 25, curve 
IV) is similar to that of the vermis cerebelli length except that it 
is somewhat greater at first and falls more rapidly. 
The percentage increment of the vermis cerebelli height, when 
calculated for fetal months (fig. 27, curve IX), shows a rate of 
