Annals of the Transvaal Museum 
105 
end of the crista radialis. The broad ridge running upwards from the condylus 
medialis seems to reach the medial side of the processus lateralis. The anterior 
surface between these two ridges is strongly concave ; in its distal part this 
concavity contains a circular depression. The anterior surface of the distal 
end is concave. The breadth of the distal end is 9 cm. Thickness medial 
condyle 3-9 cm., breadth 5 cm. Thickness lateral condyle 4-3 cm., breadth 
Text-fig. 9. Dromicosaurus gra- 
cilis. Distal end of left hume- 
rus. Outline of distal surface 
seen from below. Medial side 
to the left. Less than x 
2*9 cm. The articulation surface of the lateral condyle is divided into two 
facets, an outer, which is directed downwards and inwards, and an inner, 
which is directed downwards and outwards, meeting in a ridge, which runs 
through the middle of the distal surface of the condyle and parallel to its 
lateral side. The lateral condyle leans over to the lateral side and the medial 
surface of the medial condyle is also directed forwards and sidewards. The 
distal surface of the medial condyle is convex; its medial portion is weathered. 
Radius. 
The proximal end of the left radius is present (PI. XIII, figs. 5 and 6). The 
length of the articulation surface is 4-7 cm. and its breadth is 2-7 cm. The 
surface is cylindrically concave, and the axis of this cylinder is directed from 
the anterior end of the antero-medial border to the posterior end of the 
postero-lateral border. The concavity is deepest at its anterior end, where it 
makes the deepest notch in the border. The posterior part of the antero- 
medial border and the anterior part of the postero-lateral border are both 
drawn upwards; the former is slightly higher than the latter. The edges of 
the articulation surface are broad and rounded. 
Pubis. 
When the fossil was discovered the pubes were still in situ , but all the 
covering matrix had completely weathered away. The proximal end of the 
right pubis was lost. The upper inner corner of the plate of the left pubis 
was present, but the portion which is bent downwards at this corner was 
absent. As preserved, the foramen obturatorium was therefore not completely 
closed. The anterior corner of the proximal end was weathered. The remainder 
