428 
Proceedings of Royal Society of EdinhurgTi. [sess. 
Skull-Cap. 
This consists of the vault of the cranium from the glabella and 
supra-orbital arches in front to two finger-breadths below the 
occipital protuberance (inion) and superior curved line. It is a 
long ovoid, 185 mm. in glabello-occipital length; 130 mm. in its 
greatest transverse breadth ; 90 mm. in breadth immediately 
behind the orbits, a dimension which, the author says, would 
probably have been 4 mm. greater in the unbroken skull. The 
highest point of the vault of the skull was in the parietal region, 
and was 62 mm. above a sagittal line drawn horizontally backwards 
from the glabella to the inferior curved line of the occiput. The 
relation of length to breadth w^as as 100 to 70, so that the skull 
was dolichocephalic. The supra-orbital ridges and glabella had 
great prominence, and the frontal sinuses were well developed. 
The greatest sagittal depth of a frontal sinus was 24 mm. The 
sagittal diameter of the cranial cavity was 155 mm. The thickness 
of the occipital bone a little below the inferior curved line was 4 ’5 
mm. The frontal bone was slightly keeled in the line of the ob- 
literated frontal suture, and the other sutures of the cranial vault 
were obliterated. The general surface of the outer table of the 
skull was smooth, and there was an absence of bony ridges. The 
vault of the skull had an arch much below the European human 
skull, but higher than that of anthropoid apes. The supra-inial 
part of the occipital bone sloped upwards and forwards from the 
inion, as in the hleanderthal skull, whilst the infra-inial part, to which 
the muscles of the back of the neck were attached, sloped down- 
wards and forwards to where the foramen magnum had been, 
though the actual position of this hole cannot be stated with 
certainty. The forward slope of the nuchal part of the occiput 
was, without doubt, in relation to the curve of the encephalon and 
the greater volume of the cerebrum in relation to the cerebellum, 
which one associates with the erect attitude. From the obliterated 
condition of the sutures the skull was obviously that of a person 
not below middle life. Dubois thinks, from the absence of ridges 
and from the superior temporal lines on the opposite sides of the 
skull being quite independent, that the cranium must have been 
