914 REPORT ON AN ADDITIONAL COLLECTION OF SKELETAL 
HUMERUS— DEFECTS OF THE SEPTUM 
ARKANSAS LOUISIANA 
Defects Eu DE en TEN — | Та — 
| Males Females | Males Females 
| | | 
¡Right Left | Right Left Right Left | Right Left 
| 
| 
Total number of speci- | 
mens examine у 12 4 | вв 2 S2 yu 
Defects: pin-point |o 1 — | — 2 | — же = 
small ЕЕ 2 1 | = пее: کا‎ 4 
| | | | 
medium | — 3 £ oa 2 7 |-% 
| | | | 
large | 2 1 = ИН ДА grs 1 1 2 
| | | 
special | -- -- а Тара) | Шен 1 (а) SS EM 
| | | 
Total defects зи. 7 EA” LE E ЗК: 8 | 12 
Percentage of bones with | | | | 
defects | 45% | 58% | 75% | 67% 1650 30% | 40% | 71% 
! 
Percentage of bones with À | 
defects according to | 
locality | Arkansas, 58% | Louisiana, 38.5% 
Percentage of bones with | 
defects according to 
sex 
| Males, 34.5% | Females, 57.5% 
Percentage of bones with | 
defects according to | 
side ње 57.5% | Left, 47.2% 
ң The Radius. 
As with the humerus, the dimensions of the radius are quite similar in the 
Arkansas and Louisiana skeletons; and, as in whites, the bone averages slightly 
longer on the right side. In strength and curvature the radii of both groups are 
generally moderate. | : 
The principal interest of the radius lies in the comparison of its length with 
that of the humerus, or in the so-called radio-humeral index. This proportion is 
decidedly greater in Indians than in whites, showing that the Indian forearm is 
relatively longer, a feature common to the less advanced races. Тһе examination 
of the bones of 526 white males and 212 white females gave the writer an average 
radio-humeral index of 73.6 for the former and 72.8 for the latter. In the Indians, 
as is seen in the above table, the index averages approximately 75.3 for the 
Arkansas and 77.7 for the Louisiana males, with 76.8 for the Louisiana females. | 
Both in whites and in Indian males it is slightly higher on the right than on the 
left; the small group of female skeletons from Louisiana form an exception. 
