228 ROYAL SOCIETY OF CANADA 
to meet the pterygoid, its lower extremity being at about the same 
level as the lower end of the downward extension of the exoccipital. 
Anteriorly the quadrate bounds the pro-otic and alisphenoid behind 
and meets the parietal from below in a horizontal suture. The large 
foramen ovale, the opening for the passage of the trigeminal nerve, is 
preserved. It is bounded behind by the pro-otic and in front by the 
alisphenoid.  Anteriorly the rostrum of the basisphenoid is broken off 
leaving exposed the pair of foramina that lie immediately beneath the 
pituitary fossa. These two foramina provide for the passage of the 
carotid arteries. In advance of the basisphenoid are the coalesced 
pterygoids of which only a small portion remains in the median line 
clasping the anterior face of the basisphenoid. The posterior narial 
opening is not preserved but a small part of the roof of the narial 
passages remains in the pterygoid fragment immediately in front of 
where the opening evidently was. This roof (inclined upward and 
forward at an angle of 45° to the horizontal) exhibits two longitudinal 
channels, side by side, each of which consists of a succession of oval or 
oblong shallowly excavated depressions placed end to end. 
Within the brain case the sutures between the parietal and the 
alisphenoids are well shown as well as those between the latter and 
the pro-otics. Behind the parietal and hounding the pro-otic above in 
rear is part of a bone that is evidently the epiotic. The basisphenoid 
appears in the floor of the brain case in advance of the basioccipital. 
The pro-oties rise from the superior border of the former posteriorly 
and reach forward below the foramen for the trigeminal] nerve. The 
roof and sides of the brain case are considerably damaged behind as 
are also the walls of the tympanic cavities. 
Cranial measurements. 
MM 
Width between outer edges of quadrates, posteriorly ........ 201 
Height of occiput, in median line, from upper surface of 
parietal to anterior edge of opening of median Eustachian 
Gaal iit! PEAU A EL liek SR CERN LOC RU 90 
Height’ ofctoramen tmacmibar pe en a tees Ur EN 7 ARR 14 
Width. of same. fetes PPS RE ER NN SAN 17 
Height of bagioccipital; im median) lime 1h ANR 42.5 
Breadth of samé\at mid-hight)) Den een An 39 
Height posteriorly of supraoccipital, in median line ........ 21.5 
Breadth’ of condyle: ofiquadrate tete ho: tent seen Pres 39 
Height of sameyat centre] PAU anne etre 15 
