File:The Quarterly journal of the Geological Society of London (12960397284).jpg

.28
H. Gt. SEELET ON KHAMPHOCEPHALTTS PKESTWICHI.
overlapped the posterior portion of the parietals and curved with
them backward and outward. There is on the lateral portions of
the parietal a slight impression of the bone, which also suggests to me
this interpretation. The pa-
rietal (p) terminates anteriorly Cast of upper surface of Shull of
in a transverse suture in which Ehamphocephalus Prestwichi,
it joins the frontal bones (/) ; natural size.
this suture is nearly straight,
being curved slightly backward.
The length of the parietal bone
is exactly 3 centimetres ; its
posterior width, as preserved
(which is less than the real
width), is about 25 millimetres ;
'the greatest constriction of the
bone from side to side just in
front of the notches appears to
be about 8 millimetres or rather
more, while the anterior width
of the bones at their union with
the frontal bones is 23 milli-
'metres.
There is a moderate trans-
verse depression on the skull
where the parietal bones join
the frontal. Unfortunately
there is no indication of the
character of this long cerebral
region, though it is evident that
there was a concavity below the
slender squamosal arch. The
parietal appears where it joined
the frontal bone to have given
attachment to the postfrontal,
at the back of the orbit, in the
usual way ; but, apparently
from the sharp downward curve
of the postfrontal bone, no trace
of it is preserved. The width
of its union with the roof -bones
o1^ the skull was about 5 milli-
metres. The frontal bones
measure in length 18 milli-
metres, are greatly constricted
in the orbital region and cupped
with almost semicircular bor-
ders for the orbits. The width
of the interorbital part of the frontal
bones is 5 millimetres, and the
extent of the bone posterior to the orbit at its outer border is 4 mil-
ox, articular surface for occipital bone