ri6 Annals of the Transvaal Museum 
the postero-medial corner of the surface. The portion of the proximal surface 
which lies lateral and anterior to the ridge slopes more strongly forwards and 
is concave medially. The posterior border of the surface is concave laterally 
and convex medially. The lateral border overhangs the lateral surface of the 
shaft. The antero-medial corner is slightly lower than the postero-lateral one. 
Text-fig. 2 1 . Bromicosaurus gracilis . 
Outline of the proximal end of 
the left ulna(P), seen from the 
proximal side. Posterior side to 
the left and lateral side above. 
x i- 
If this is actually the proximal end of the left ulna, then a large portion of the 
antero-medial angle of the head has worn away. 
Discussion. 
It will not be necessary to compare with the Plateosaurid Eucnemesaurus , 
for the present form is plainly an Anchisaurid. 
The trochanter quartus of our form lies relatively much deeper than that 
of Plateosaurus stormbevgensis. 
A comparison with Massospondylus carinatus is difficult, because most of 
the type remains are fragments. The head of the pubis shows some important 
differences. In the first place the length of the head of the pubis of Masso- 
spondylus .carinatus as figured by v. Huene ( 4 , p. 38, fig. 51), and measured 
from the articulatio ischio-pubica straight across to the anterior surface, is 
9-6 cm. In our form the upper anterior portion of the head is damaged. As 
preserved, the length of head and processus subacetabularis together is 7-1 cm. 
In the above the total length of the undamaged head was estimated at 7-5 cm. 
It can certainly not have been more than 8 cm. It appears, therefore, that 
the pubic head of Massospondylus carinatus is longer than that of our form. 
It is, however, apparent from the femur that our form is a bigger animal than 
the type of Massospondylus carinatus. The pubic head is, therefore, relatively 
much longer than that of our form. The thickness of the head is about half 
that of our form. The section of the neck of the pubis, which has the shape 
of a very elongated oval with pointed ends, differs considerably from that of 
the present form. 
The coalesced portion of the ischia shows different sections to that of the 
form just described. Sections of the coalesced portion in our form are tri- 
angular everywhere, they do not even approach the rounded form of the 
distal end of the Massospondylus fragment. 
The length of the femur of Massospondylus carinatus is estimated at 43 cm. 
The length of the lower portion below the trochanter quartus is about 22 cm. 
In our form these lengths are 49-5 cm. and 28 cm. Our femur, therefore, is 
longer. In the femur of Massospondylus carinatus, however, the trochanter 
major lies 9 cm. below the proximal end, while in our form this distance is 
only 7-5 cm. The breadth of our femur above the trochanter major is 7*5 cm. 
and its thickness there is 3-6 cm. (the bone is not crushed). In Massospondylus 
carinatus these dimensions are 7 cm. and 4-4 cm. respectively. These dimen- 
sions show, therefore, different relations in the two bones. 
The tibia of Massospondylus carinatus is not complete. However, the 
proximal and distal ends are preserved, v. Huene gives the following measure- 
