Annals of the Transvaal Museum 
133 
of 3-6 cm., the medial border a length of 3-9 cm., the posterior border a length 
of 3-1 cm. to 3-3 cm. and the anterior border a length of 2-6 cm. Ridges run 
from the corners of the proximal surface downwards on to the shaft. The 
upper end of the antero-lateral ridge is very thin and sharp; the antero- 
medial ridge is rounded ; the two posterior ridges stand out prominently but 
are deformed. All these ridges submerge into the rounded edges of the shaft. 
There is a small tuberositas on the lateral border of the anterior surface near 
the middle of the shaft. At its narrowest part the shaft has a breadth of 
2-5 cm. and 2-3 cm. and a thickness of 1-5 cm. and 1-7 cm. in the right and 
left bones respectively. The distal articulation surface does not stand at right 
angles to the shaft, its medial end being higher than its lateral end. As pre- 
served, the breadth of the distal end of the right bone is 3-8 cm., its lateral 
thickness r6 cm. and its thickness at the medial side 2-2 cm. The medial 
thickness of the distal end of the left bone is 2-5 cm. The articulation surface 
passes higher up on the medial side of the anterior surface of the bone than 
on the lateral side. Posteriorly the medial side of the distal end has a back- 
wardly directed process, the lower surface of which is a backwardly directed 
process of the articulation surface. The middle of the posterior surface of the 
distal end is slightly concave. The greatly elongated lateral collateral pit is 
much deeper than the medial one. The anterior surface of the distal end is 
smooth. 
Metatarsale III has a length of 15-5 cm. The proximal articulation surface 
has a triangular shape. The bone is very much flattened, but as preserved, 
the hinder angle lies towards the medial side. The two anterior angles lie 
close together. As the medial anterior ridge is broken off the lengths of the 
medial and anterior borders of the proximal surface cannot be given, but as 
preserved they are each approximately 2-5 cm. The lateral border has a length 
of 4-7 cm. The two medial ridges converge downwards and subside into the 
medial side of the shaft. At this point the medial side of the shaft is slightly 
convex. The lateral side of the shaft shows a small tuberositas a short distance 
above this medial convexity. The lateral ridge disappears earlier into the 
lateral side of the shaft. At its narrowest part the shaft has a breadth of 
2-3 cm. and a thickness of 1-3 Cm. The axis of the distal articulation surface 
does not stand at right angles to the shaft, its medial end being higher than 
its lateral end. The breadth of the distal end is 3-6 cm., its lateral thickness 
1-7 cm. and its medial thickness 1-9 cm. The middle of the posterior surface 
of the distal end is concave. Posteriorly the medial side of the distal end has 
a backwardly directed process, the lower surface of which forms a backward 
prolongation of the articulation surface. The anterior surface of the distal 
end shows a peculiar feature. The centre above the articulation surface is 
convex. Around and above this convexity there is a half-moon shaped con- 
cavity. Above this is the flat anterior surface of the shaft. Both collateral 
pits are deep, but the lateral one is deeper. 
Metatarsale IV has a length of 14 cm. As preserved the proximal portion 
is very thin; its anterior surface is convex and its posterior surface is concave. 
Its greatest thickness here is i-i cm. and its breadth 6 cm. The bone has 
suffered greatly from pressure and is quite out of shape. A ridge runs down 
its anterior surface and starting near the middle of the upper end reaches the 
medial side above the middle of the shaft. At this point it forms an elongated 
knob on the side of the shaft. At its narrowest part the shaft has a breadth 
of 2-4 cm. and a thickness of 1 cm. The lateral end of the distal articulation 
surface is situated much higher than the medial end. Anteriorly the breadth 
of the articulation surface is 2-5 cm., posteriorly it is 3*1 cm. The reason of 
