Fig. 7. Right radius and ulna, distal end of ulna
from specimen No. 3275—½ natural size.
Fig. 8. Left femur posterior side—½ natural size.
The radius and ulna were from another specimen which, however, was associated with a typical astragulus. The two bones are long, slender, strongly curved, and in contact with each other throughout their entire length, so that there could have been no rotary movement of the forearm. The radius is a slender bone with the proximal articular facet relatively small, the facet being slightly concave, of ovoid outline and with the transverse diameter the greater. There is but a tiny band-like facet for the ulna situated on the posterior side near the inner margin. Distally, the radius widens into a heavy end with a rugose area on the outer side for contact with the ulna, and with two distal facets, a larger for the scaphoid, and a smaller for the lunar, the two being separated by a low ridge.
The ulna is heavier above, with a strong backwardly directed olecranon process. The sigmoid notch makes almost a semicircle, the articular surface being broad and extending well onto either side of the bone. The facets for the radius are tiny. The distal end of this bone is wanting.
| Measurements, Specimen 3275 | ||
|---|---|---|
| Radius, | length | 251 mm. |
| greatest width at proximal end | 28 mm. | |
| greatest width at distal end | 36 mm. | |
| least diameter of shaft | 16 mm. | |
Fig. 9. Distal end of
left tibia—½
natural size.