SOCIETY OF THE UNIVERSITY OF ABERDEEN. 



141 



Bones of Extremities. The clavicles of both skeletons are rela- 

 tively long, straight and slender bones. The forearm bones are also 

 slender and somewhat more curved than usual. 



TABLE III. 

 MEASUEEMENTS IN MM. OP BONES OF EXTEEMITIES. 



The femora are platymtfric, and the tibiae platycnemic with torsion 

 of the shaft and retroversion of the head. 



The fibula in these short cist skeletons present characteristic 

 appearances. It is a stout bone with its muscular impressions and 

 ridges largely developed. The shaft differs from the modern bone in 

 having its transverse diameter much greater than its antero-posterior ; 

 thus in the Blackhills skeleton a section across the middle of the 

 shaft of the fibula measures 13 mm. in its antero-posterior diameter 

 and 20 mm. in its transverse diameter. The surfaces for the attach- 

 ment of the peronei muscles and for the flexor longus hallucis muscle 

 are very extensive. 



The astragalus also shows characteristic features. The astragali 

 of the Blackhills skeleton are of an average size, but the angle of the 

 neck is large, being '22 instead of 15, the average angle in the 

 modern European astragalus. Along the inner border of the upper 

 surface of the neck is a distinct articular facet, and the internal 



