8 Transactions of the Royal Society of Soiitli Africa. 
slightly smaller basilo-bregmatic height, follows closely this new skull in 
general features. Now, the Cro-Magnon man is a prehistoric type of 
undoubted Negroid affinities, and it is possible that in the Boskop man we 
have a member of a race which ultimately developed into the Bantu type. 
Mandible. — The left horizontal ramus is preserved almost entirely^ 
together with a somewhat incomplete second molar. The ramus is low 
The greatest height near the symphysis is 27 mm., and its greatest thick- 
ness at the same spot is about 13-2 mm., so that its " indice de robusticite 
is about 50, a number greater than that of modern man and slightly less 
than that of the man of La Chapelle. 
The anterior face of the ramus reaches almost to the symphysis, and 
shows a slight, somewhat triangular symphysial ridge in the lower half. 
The alveolar border has been rubbed away to a certain extent on the front 
face, but it seems probable that there was a slight chin. The foramen 
mentale appears to be nearer the upper border of the ramus than it is to the 
lower ; but resorption of the alveolar border has gone on to a large extent, 
so that the alveolus for the first molar has been totally filled with bone. 
Owing to resorption, the upper external border of the ramus from the 
first pre-molar backwards coincides with the external oblique line. In the 
canine region the upper part of the outer surface has been worn away 
slightly. 
The posterior face of the ramus is not preserved quite to the symphysis. 
At the broken inner edge, about 8 mm. below the upper border, is seen a 
depression representing the left vascular foramen. Below this the surface 
is slightly concave for a short distance, and then swells to form the trans- 
verse convex protuberance which continues into the inconspicuous mylo- 
hyoid ridge. Below this is seen the outer half of the oval, elongate- 
digastric fossa. The digastric fossa appears more on the posterior and 
less on the inferior surface than in the La Chapelle jaw, and was compara- 
tively small. 
The alveolus for the first incisor is missing ; that of the second incisor 
(represented by its outer portion) is small. That for the first premolar is 
enlarged into a roughly circular hole with a diameter of 9 mm. Portion of 
the alveolus of the second premolar is preserved. 
The length of jaw in front of the molars — measured along the border — 
was about 33 or 34 mm. The first molar is, however, missing, and its 
alveolus is completely filled with bone. Eadiographs of the jaw fail to show 
any tooth fragments still remaining in the bone. The premolar length 
cannot be absolutely determined, but it was essentially human. 
The second molar is partly preserved, together with the anterior part of 
the alveolus of the third molar. The total molar length was about 31 mm. — a 
length comparable with that of the modern European and considerably less, 
than that of the Grimaldi type, or even of the Australian. 
