GROWTH OF THE FETAL CENTRAL NERVOUS SYSTEM 473 
0 ! ie J A 5 6 G 8 9 10m. 
Fig. 32 A series of curves illustrating by linear measurements the growth of 
the cerebrum, brain stem, and spinal cord. Abscissa: fetal months (crown- 
heel reduced to time by Mall’s convention). Ordinates: lengths of the cere- 
brum, brain stem, and spinal cord in em. (Data from formulae in table 43.) 
I, fronto-occipital diameter. II, temporal diameter. III, frontospinal length. 
IV, spinal cord length. V, brain-cord length. 
