78 
Annals oe the Transvaal Museum. 
The Squamosals. 
These bones do not deviate from the already known shape. 
The Lower Jaw. 
The lower jaw has been sadly damaged. It has broken in three parts. 
The right ramus is broken just behind the outer portion of the angular 
and the left ramus across the hinder end of the surangular. The upper 
part of the dentary is also broken off. The hinder end of the left ramus 
has not been found. The front part of the jaw has been displaced and 
is now situated to the right of the skull with the hinder end of the right 
angular on the right maxillary and the hinder end of the left angular in 
front of the alveolar border (Pis. XI, XII). The hinder part of the right 
ramus is lying upside down across the front of the right quadrate 
(PI. XI). 
The described parts show the same general features as the lower jaw 
described in 6. Everything is of course much larger and more massive. 
The two grooves on the front surface of the symphysis are broad and run 
right down to the opercular. The ridge on the dentary, parallel to the 
alveolar border and starting behind the middle of the depression for the 
tooth, is in this instance really to be taken as a thickened upper and front 
border of the outer opening of the vacuity in the jaw. The grooves on 
the upper border of the dentary are deep and broad. The upper con- 
nection of the two parts of the angular is beautifully shown in the right 
ramus and also the sutural ridges of the inner portion which support the 
prearticular. The prearticular is broad in front and becomes narrower 
backwards. The articulation part shows the usual shape. The pre- 
articular forms a large lower process to the hinder extremity of the jaw. 
Dimensions : 
Greatest breadth of the jaw across the symphysis 65 mm. 
Height of the remaining part of the symphysis 83 mm. 
The height of the complete symphysis must have been about 100 mm. 
Length of the jaw approximately 210 mm. 
Height of the hinder end of the outer portion of the 
angular 50 mm. 
Breadth of the articulation part (with inner process) 40 mm. 
Thickness of ramus over the outer ridge on the dentary 37-40 mm. 
The Vertebral Column. 
There is not much left of the vertebral column and the ribs. Only 
a few of the vertebrae have been found and these are scattered among 
the other bones. A few ribs are packed together directly behind the skull 
and a few others are lying to the left of the left ilium. This material is 
not in a condition to add anything further to our knowledge. 
One part of the fossil gives the impression of being the sacrum, but 
it is so badly preserved that nothing further can be said about it (PI. XI). 
The Shoulder Girdle. 
The distal part of the left scapula and the proximal part of the right 
one are visible. The shoulder girdle is further represented by the 
