262 Proceedings of the Moyal Physical Society, 
the palate bone, is 8J inches ; from this point of the palate 
bone to the posterior edge of the basi-sphenoid, the distance 
is 2J inches ; the length from the incisive edge of the pre- 
maxillaries to the coalesced basi-sphenoid and basi-occipital 
is, therefore, 11 inches, or half an inch less than in the skull 
from Old Calabar ; and from the anterior border of the pre- 
maxillary bones to the anterior edge of the foramen magnum, 
the total length at the base of the Honduras skull is 13 
inches. The pterygoid bones are 2 J inches in length, with 
a smooth outer ridge behind, and another inner ridge, which 
terminates in a short obtuse hamular process. They coalesce 
with the pterygoid processes of the palate bone, which are 
large, twisted backwards and outwards, and cover, without 
concealing, the posterior aveoli. 
The foramen magnum is oval transversely, 2 inches from 
side 16 side, and an inch and a half from above downwards. 
The occipital condyles are lyVth inch in length, and ly^th 
inch in breadth, and approximate to each other in front. 
The paroccipital wings at the posterior roots of the condyles 
expand upwards, inwards, and outwards, in a broad semi- 
lunar form, convex above and concave below, where they 
join the less prominently developed mastoids. 
From the posterior edge of the foramen magnum, along 
the perpendicular occipital spine, to the large straight trans- 
verse occipital ridge, the distance is 2Y\th inches; and from 
the middle of the occipital crest to the anterior incisive 
margin of the premaxillary bones, following the curve of 
the coronal aspect, the length of the skull is 15 inches. 
There is a deep hollow space extending along the middle of 
the upper convex aspect of the skull, which is formed by a 
strongly developed longitudinal ridge on each side. These 
lateral ridges commence at the posterior inferior parietal 
angle, where they are 3 inches apart ; the parietal portion of 
the ridges gradually approximate as they advance forwards, 
until, at the coronal suture, they are only an inch apart. 
The ridges again diverge, increase in size, and form two 
anterior superior parietal processes, which extend forwards 
for about 2 inches in a notch in the frontal bone. They 
then advance forwards and outwards as frontal ridges, nar- 
