GROWTH ' OF THE FETAL CENTRAL NERVOUS SYSTEM 477 
1Omos. 
i a 4 5 6 16 8 2 
Fig. 36 A series of curves illustrating growth of the brain, brain parts, and 
spinal cord in per cent of the respective new-born volumetric determinations. 
Abscissa: fetal months (crown-heel reduced to time by Mall’s convention). 
Ordinates: per cents of volumes as compared with the respective new-born volu- 
metric determinations. (Data from the formulae in table43.) I, encephalon 
volume. II, cerebral hemispheres volume. III, cerebellum volume. IV, pons 
and medulla volume. V, midbrain volume. VI, spinal cord volume. 
