GROWTH OF THE FETAL CENTRAL NERVOUS SYSTEM 467 
fe) 
05 S10 «(1015 §=61520 0 = 2025) 530 HSH 3H540 )=—40-45 «24550 BO55an. 
Fig.26 A series of curves illustrating the percentage increments of the various 
volumetric determinations of the brain, brain parts, and spinal cord. Abscissa: 
total body length incm. Ordinates: percentage increments calculated from the 
formulae of the respective absolute growth curves. (Data from tables 2, 4, 5, 8, 
10, 12, 18, 24, 28, and 34.) I, percentage increment of central nervous system 
volume. II, percentage increment of encephalon volume. III, percentage in- 
crement of entire brain weight by literature. IV, percentage increment of right 
hemisphere volume. V, percentage increment of left hemisphere volume. VI, 
percentage increment of both hemisphere volume. VII, percentage increment 
of cerebellum volume. VIII, percentage increment of pons and medulla volume. 
IX, percentage increment of midbrain volume. X, percentage increment of 
spinal cord volume. 
THE JOURNAL OF COMPARATIVE NEUROLOGY, VOL. 33, NO. 5 
