Annals of the Transvaal Museum. 
139 
its middle and its distal end is flattened. This flat portion shows an 
articulation surface over the whole of its lower (or hinder?) surface. 
This articulation surface looks mostly backwards and outwards and 
slightly downwards. It is not flat or smooth but bordered by ridges and 
covered with tuberosities. Near the upper ridge there is a fairly deep 
parallel groove. It seems that there must have been some cartilage 
between this surface and the corresponding one of the ilium. 
The Shoulder Girdle. 
The episternum is only represented in one specimen (PI. XVI and 
XXI). Its front, edge is broken off and also its right side, but this has left 
an impression. The left front side is also damaged. The outer surface of 
the bone is covered with ridges and dividing furrows, radiating from the 
centre. If the sides of the bone were straight it would be of rhomboid 
shape. The hinder angle of this rhomboid, however, is cut off and a short 
straight line substituted for it. The two hinder sides are slightly concave 
Myriodon senekalensis. The relation of scapula, cleiihrum, and clavicle. 
Sc. = scapula; Cl. == cleithrum ; Cla. = clavicle. X0,68 
and as far as could be made out the front sides are convex. The dorsal 
surface is flat and shows a broad flat ridge running transversely over 
the middle of the bone. Another broad and flat ridge starts at the end 
and vanishes towards the middle. The bone seems to be broader than 
long. 
The clavicle overlaps the episternum to a considerable extent. The 
lower end of the clavicles is flat and very broad medially, ending here in 
a fairly straight line. Towards the upper part they narrow down briskly 
with probably straight sides to about a fourth of its greatest breadth, thus 
forming a triangle. The outer surface of this triangular portion is also 
