84 
Annals of the Transvaal Museum 
No sutures are visible in the lower jaw. It is highest across the 
Meckelian aperture, diminishes in height towards the symphysis, where a 
nearly equal height is attained. Two small teeth are visible at the sym- 
physial end. Behind these there is a large tooth, which must have reached 
above the upper border of the maxillary. Between this large one and 
the next, there is a little gap. Then follow some ten uniform small teeth, 
diminishing in size backwards. 
At the hinder end of the skull there is a small, thin, curved bone, which 
is a portion of the hyoid. 
Dimensions of the skull : 
Length 91mm. 
From snout end to front of orbit 41 mm. 
From hinder margin of nostril to hinder margin of pre- 
orbital cavity 32 mm. 
Length of preorbital cavity 8 mm. 
Height of preorbital cavity 6 mm. 
Length of orbital cavity 18 mm. 
Height of orbital cavity 15 mm. 
Greatest height of dentary 12 mm. 
Height across its narrowest portion 6,5 mm. 
Greatest length of ordinary maxillary teeth 5 mm. 
Length of large teeth in upper jaw more than 8 mm. 
Length of large tooth in lower jaw 10 mm. 
The Vertebral Column. 
Only five presacral vertebrae, belonging to the lumbar region, have 
been preserved. They are amphicoelous, their neural spines are very 
broad, and there are distinct pre- and postzygapophyses. 
Breadth of the spines 5,5 mm. 
Total height of the vertebrae 15 mm. 
Length of the centra 9 mm. 
Of the tail 29 vertebrae are still present. The connection with the 
sacral portion is missing as well as the sacrals themselves, and this con- 
nection might account for quite a good number of caudals. The extreme 
end also is missing and we may therefore conclude to a very long tail, 
which was probably longer than the body with the skull. 
Eight dorsal ribs have been preserved, but the distal ends of all are 
missing. They are very slender and are clearly double-headed. 
Of the shoulder girdle the two scapulae only are present. One of 
these is well preserved. Its distal end is very broad, measuring 19 mm., 
the shaft attaining a third of this breadth, while the proximal end has a 
breadth of 12-14 mm. The length of the bone is 28 mm. There is no 
evidence of an acromion. 
The humerus is slender and is slightly bent. At the proximal end 
it is very broad through the formation of a processus 1 iteralis. Between 
the upper articulation surface and this process the edge of the impression 
is convex. The length of the bone is 50 mm. The distance from the upper 
inner end of the bone to the end of the processus lateralis is 16 mm. The 
smallest transverse dimension of the bone is 4 mm. 
