104 
Annals of the Transvaal Museum 
Nauwpoort Nek, Bethlehem District. The exact locality is about ioo yards 
above the road from Bethlehem to Clarens as it passes through Nauwpoort 
Nek and on its right-hand side coming from Bethlehem. The remains consist 
of fragments of humerus and radius, a fairly complete neck-vertebra, some 
caudal vertebrae, the pubes, the ischia, a femur, a tibia, a fibula and some 
foot-bones. 
Neck Vertebrae. 
One neck- vertebra is preserved. It belongs to the anterior region of the 
neck and may possibly be the third vertebra (PI. XVI, fig. 3). A portion of 
the neural arch with the processus spinosus is broken off. Its left side is still 
partially covered by matrix. It is cracked in different places and a broad 
crack affecting the length is now filled with matrix. The length of the centrum 
as preserved is 7-6 cm. Height of its anterior articulation surface 4-7 cm. 
Height of its posterior articulation surface 5-1 cm. Breadth of the anterior 
and posterior articulation surfaces 4-6 cm. and 4-7 cm. respectively. The 
lower surface of the centrum is deeply concave, the deepest part of this con- 
cavity lying about 3 cm. behind the anterior surface; the height of the centrum 
is here about 3 cm. and its breadth about 2 cm. Both the articulation surfaces 
of the centrum are deeply concave. The left praezygapophysis projects far 
forwards and its articulation surface is perfectly horizontal. 
Caudal Vertebrae. 
There are remains of some eight caudal vertebrae (PI. XVI, fig. 1). They 
probably all belong to the anterior caudal region and are very badly preserved. 
The two biggest centra (PI. XVI, fig. 1 a) have a length of 5 cm. and a height 
of 6 cm. Their upper breadth is about 4*5 cm. The lower end of their distal 
articulation surface is strongly recurved for the articulation of the haemapo- 
physis. The lower surface of the centrum is narrow and fairly flat; there may 
have been a very slight groove, but it is not visible now. The next following 
in size (PI. XVI, fig. ib) is only represented by the upper half of its centrum 
with its dorsal spine. One praezygapophysis is preserved. It is long and its 
articulation surface slopes inwards and downwards. The postzygapophyses 
are short and situated high up behind the dorsal spine. Their articulation 
surfaces have the same slope as of the praezygapophysis. The end of the 
dorsal spine is broken off; as preserved, its length is 5-5 cm. It is narrow and 
thick, breadth and thickness measuring 2 cm. and 1 cm. respectively, just 
above the postzygapophyses. The fourth and fifth vertebrae are slightly 
smaller than the third, but do not show any remarkable features. The other 
remains belong to three smaller vertebrae, the smallest of which has a length 
of 5-5 cm., while its articulation surfaces have a height of 3-8 cm. The lower 
ends of both articulation surfaces are strongly recurved. The lower side of 
the centrum is grooved (PI. XVI, fig. 1 c). The proximal end of a haemapo- 
physis is preserved. The breadth of its upper end is 3-5 cm. and the length 
of its articulation surface is 2-7 cm. This must be one of the most anterior 
haemapophyses, for it fits exactly on to one of the large centra. 
Humerus. 
The distal end of the left humerus is preserved in a fragmentary condition, 
but the bone has apparently not suffered from pressure. The bone is broken 
off beneath the processus lateralis (PI. XIV, fig. 6 and text-figs. 8 and 9). The 
lateral side of the shaft is also lost. The proximal plate must have made an 
angle of nearly 90° with the plane of the distal end. A narrow, high, rounded 
ridge runs from the extreme end of the condylus lateralis upwards to the lower 
