PLATE VI. 
oc. , basi-occipital radius. 
I., basi-lambdoidal radius. 
p., perpendicular radius. 
br., basi-bregmatic radius. 
g. , basi-glabellar radius. 
s. , plane of dorsum sella. 
os. , basi-occipito-sphenoid axis. 
cr., axis of cribriform plate. 
sm., spheno-maxillary line. 
Mesial antero-posterior sections of the following crania: — 
Fig. 1. Bushman from Umzimkulu (Table I.). 
Fig. 2. FuegianD. (Table II.). 
Fig. 3. Admiralty Islander A. (Table VIII.). 
Fig. 4. Oahuan D. (Table XL). 
Fig. 5. Hawaian A. (Table IX.). 
All the Figures in this Plate are one-half natural size. 
