642 
S. W. WILLISTON 
versely outward as a vertical plate, ending in a sutural articulation, 
just back of the orbit, with the anterior end of the bony ridge bound- 
Fic. 3.—Tvematops milleri. 
about two-thirds natural size. 
Side view of skull; 
ing what I believe to be 
the otic groove. The 
plate does not seem to 
reach quite to the roof 
of the skull in its middle 
part. The under margin 
of this plate is widened 
a little antero-posteriorly 
externally. Its outer ex- 
tremuty (is vlost, bute at 
doubtless unites with the 
palatines at the outer 
side of the palatal sur- 
face, and probably sends 
back a posterior process 
at the sides to connect 
with a broken extremity 
of a flat bone on the inner 
side of the quadrate. 
The attachment of this 
bone, or of a separate 
transverse bone, is shown 
by a broken edge turned 
downward a little below 
the plane of the palatines 
to abut slightly against 
the upper inner margin 
of the mandible. ‘There 
is no 
median parasphenoid 
prolongation in front of 
the basisphenoid, but a 
broken surface of a bone 
forming the brain case 
for the cerebrum may 
indication of a 
