132 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL.83 



Principal measurements (Hrdlicka) : 



500 tibiae of 

 The Rhodesian miscell. American 



tibia white males 



cm. cm. 



Length, "in position" less spine (cast) 41.3 36.5 



Length max., less spine (cast) 41.6 36.8 



At middle : 



Diam. antero-post., max. (on original) 3.40 3.13 



Diam. lateral (with anterior border of bone 

 midway between the two branches of the 



sliding calipers) (on original) 2.45 2.22 



Index at middle 72.1 70.9 



Shape of shaft at middle — Type 4 (moderately 



quadrilateral — posterior surface Similar type in 



divided by a vertical ridge into 11.5 per cent of 



two surfaces) male white tibiae 



The bone is almost perfectly straight, which is neither the case 

 with the tibiae of early nor with a large majority of those of recent 

 man, with two marked exceptions — tibiae of precisely this form are 

 typical of the tall negro, and bones of same nature have recently 

 been found, with somewhat but not fully negroid (proto-negroid?) 

 skulls, in late prehistoric burials in British East Africa by Mr. 

 Leakey/ 



The Broken Hill tibia shows certain peculiarities which at first 

 sight seem to separate it from others. These consist in a certain 

 slenderness and more than ordinarily marked bilateral concavity, me- 

 sially and laterally, below the condyles. In addition there is a smooth 

 surface above the tuberosity, somewhat concave from side to side, 

 and a pronounced large faceted eminence outside of this concavity, 

 below the anterior border of the lateral condyle. There is seen further, 

 just below this eminence, a marked looping ridge. It passes upwards 

 and outwards from the tul^erosity, forms the lower boundary of the 

 subcondylar eminence, then passes backward to within a few milli- 

 meters of the fibular facet, turns in a loop downward and forward, 

 reaches the middle cf the lateral surface and then descends, diminish- 

 ing, down this surface to the middle of the shaft where it merges 

 with the lateral border of the latter. The facet for the fibula is 

 somewhat raised inferiorly. The medial condyle and its articular 

 facet show a fairly marked inclination backward. And there are a 

 few minor points. 



' The interesting originals, composing an important collection, were kindly 

 shown to me in 1927 by Mr. Leakey at the College of Surgeons, London, where 

 they were being studied by the discoverer. 



