212 
REPORT ON AN ADDITIONAL COLLECTION OF SKELETAL 
The dimensions of the shaft at the middle show ап average lateral diameter! 
very nearly as large as in the whites; but the average antero-posterior diameter? is 
This is best shown in the percental relation of these two 
decidedly smaller. 
diameters, or index of the shaft at middle. 
This in the writer’s series of 304 white 
American males averages on the right 81.6, and on the left 83.9; and in 97 Ameri- 
can females, on the right 78.8, and on the left 79.6. 
sideration, the same index averages 74.4 (Arkansas) and 76.8 (Louisiana) on the 
right, and 75.4 (Arkansas) and 77.8 (Louisiana) on the left in the males; while in 
the females it is 69.8 (Arkansas) and 73.1 (Louisiana) on the right, with 73.1 
(Arkansas) and 73.9 (Louisiana) on the left. 
In the Indians under соп- 
These proportions show that the 
humeri of the Arkansas and Louisiana Indians are both weaker and flatter than 
In both the white and the Indian, and in 
those of the average white Americans. 
both sexes, the left humerus shows a higher index of the shaft than the right bone; 
this is due to the fact that its lateral diameter is smaller, as compared with that of 
the right humerus, while the difference is less in its antero-posterior dimension on 
the two sides. 
HuMERUS—LENGTH: DIMENSIONS AND INDEX AT MIDDLE. 
RADIUS—LENGTH : RADIO-HUMERAL INDEX 
Num- Num Average Num- | Average diam-| Num- Average 
Sex E ber of |Average length| ber of diameter ber of | eter antero- | ber of index 
and Locality Side speci- aximum) | speci- lateral at speci- | posterior at | speci- of shaft 
mens mens middle mens middle mens at middle 
Males cm. cm. cm. cm. 
> пат 2 1.70 74.4 
Aue DE ЖА (mama Š | gosse. 1-10: 1s) |. 10 | (60.4-88.7) 
uei ha ` 32.6 io 22 ù 1.67 i 75.4 
(29.4-34,2) (1.92-2,35) (1.5-1.8) (72.7-80.9) 
е 32.7 2а 1.76 76.8 
22 Right 19 | (30:6-35.2) | 18 | (18522) | 18 | (1.35-1.95) | 18 | (64.6-90.7) 
Louisiana 
deu Z2 1.74 77.8 
Left | 19 | (30.2-85.8) | 18 | (1.86-2.7) | 18 | (135205) | 18 | (68.1-89.1) 
Females Eh. d 28.9 5 2.05 5 14 5 69.8 
Arkansas : (27.6-30.2) (1.8-2.2) (1.3-1.6) (66.7-72.7) 
Boytt's Field ial s 28.9 5 2.0 5 1.4 5 70.3 
| (28.0-29.9) (1.75-2,2) (1.15-1.6) (65.0-80.0) 
Ñ 30.2 2.05 Z ré gH 
st Right 13 | (083320) | 18 | (1822) | 19 | (13516) | 13 | (67.5-80.6) 
Louisiana | 
29.8 2.0 13 III 
ее тшш пат | " | qata | PP. | оваз) 
Num- 
ber oí 
speci- 
mens 
[^ 
о 
ка 
° 
к 
н> 
~ 
н> 
avasi Num- 
lengt ber of 
(maximum) speci- 
of radius mens 
CH. 
25.0 
(24.4-25.7) 
24.7 
(24.1-25.5) 
25.3 
(24.1-26.5) 
25.1 
(22.9-26.5) 
22.7 
(21.9-23.7) 
22.6 
(21.6-24.1) 
* Applies to pairs only. 
_* Parallel with the anterior surface of the bone. 
? At right angles to its anterior surface, 
دن 
e 
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