I 3° 
Annals of the Transvaal Museum 
postacetabularis to the upper border, is 13 cm. in the left and 13-5 cm. in the 
right ileum. The acetabular notch has a depth of 5 cm. and a breadth of 10 cm. 
in the left ileum. The crista supra-acetabularis projects to the lateral side as 
a sharp, thin ridge from the proximal two-thirds of the processus praeacetabu- 
laris. Probably it continued right down to the distal end of the processus 
praeacetabularis. This ridge becomes thicker and lower on the iliac plate, 
where it dies out before reaching the processus postacetabularis. The ace- 
tabular surface has a breadth of 3 cm. in the left ileum and of 4 cm. in the 
right one. It is concave in all directions. The inner border of the acetabular 
surface is a sharp ridge . The processus praeacetabularis reaches further forwards 
than the spina iliaca anterior. There is a deep notch between the two, which 
is much wider in the right than in the left ileum, probably a result of pressure. 
The length of the processus praeacetabularis is 9-5 cm. There are two sacral 
ribs (?) on the medial side of the right ileum. The posterior one is situated 
on the hinder border of the bone, and both have been pressed into the bony 
matter of the ileum. They are just where one expects the crista medialis. 
The acetabulum of the left ileum gives one the impression that in the natural 
position of the bone the end of the spina iliaca anterior was situated nearly 
perpendicularly above the head of the femur. 
Pubis. 
Both pubes are present, but in a very bad condition. The distal portion 
of the right pubis is missing. The processus subacetabularis and the down- 
ward bent portion at the upper inner corner of the pubic plate of both pubes 
are missing (PI. XIX, fig. 3) . When found the pubes were lying parallel and near 
to each other, but there was no bony connection between the pubic plates. 
However, it seems not improbable that the pubic plates were originally 
coalesced. The medial borders of both plates are fractured over their whole 
length. Although very much flattened, the right pubis still shows that the 
neck has an anterior and a medial surface, which round off broadly into each 
other. The lateral posterior surface of the neck is convex. The inner border 
of the neck is sharp. The shape of the neck is, therefore, essentially the same 
as that of the pubis of Dromicosaurus gracilis . The length of the right pubis 
as presefved is 28 cm. The breadth of the pubic plate in the middle, as pre- 
served, is more than 4 cm. 
Ischium. 
The proximal portions of both ischia are present. They are completely 
flattened out and so crushed generally, that it will suffice to figure them 
(PI. XIX, fig. 4). It seems, however, that the articulatio iliaca made a much 
larger angle with the general long axis of the bone than in Dromicosaurus 
gracilis. 
Femur. 
Both femora are present, but they are badly crushed. The left femur 
(PI. XX, figs. 1 and 2) was broken in several places, but the pieces were fitted 
together and joined with plaster of Paris by myself; these fractures have had 
no influence on the length of the bone. Both bones are curved sigmoidally, 
concave above and convex below towards the front. Most of the curvature, 
however, has been crushed out of the right femur. The length of both femora 
is 35 cm. The breadth of the proximal end, measured from the tip of the caput 
femoris to the lateral side, is 10 cm. in the left and 9-5 cm. in the right femur. 
These measurements are of course very much exaggerated through the crushing 
of the bone. The original breadth can easily have been 1 cm. less. The caput 
femoris is directed inwards; as preserved its height is about 4 cm. and its 
