Skeletal Parts
There are seven adult skeletons of males and seven of females. For present purposes it will suffice to take the males alone and to restrict consideration to the long bones. The essential data on these are given on page [160], where they are contrasted with those of North American Indians in general, and with those of the western Eskimo.
The bones show both relations to as well as differences from the bones of Indians in general and fair distinctness from those of the Eskimo.
Contrasted with the long bones of miscellaneous North American tribes taken together, the Yukon Indian bones show absolutely slightly shorter humerus (or arm), somewhat shorter radius (or forearm), a slightly shorter femur (or upper part of the leg), and a plainly shorter tibia. These Indians had therefore relatively somewhat shorter forearm and especially the leg below the knees than their continental cousins. These facts are plainly evident from the radio-humeral and tibio-femoral indices of the two groups. In this relative shortness of the distal parts of the limbs the Yukon Indian approaches the Eskimo, standing near midway between the Indian in general and the Eskimo. There might be a ready temptation to attribute this to a mixture with the Eskimo; but an examination of the records will show that the same condition, so far at least as the upper limb is concerned (lower?), is already present in the old Bonasila skeleton, which gives no suggestion of an Eskimo mixture. It is more likely, therefore, that these are generalized characteristics of functional origin such as a considerable use of the small canoes. This view seems to be supported by the relative strength of the bones. In the Yukon Indian the humerus is stouter, the femur of the same strength, and the tibia very perceptibly weaker than they are in Indians in general. In the Eskimo, with even greater dependence on the canoe, both the humerus and the femur are notably stouter, while the tibia is weaker, than are similar bones in the Indians in general.
The humero-femoral index in the Yukon Indians is unusually high, indicating a relative shortness of the femur. This character is not present in the Eskimo, nor in the continental Indian. It is probably also of old functional origin, though, this for the present must remain a mere suggestion.
All of this shows clearly the interest and value of other skeletal parts than the skull, and particularly of the long bones, for anthropological studies.
Skeletal Remains from the Bank at Bonasila
The skeletal material from the bank at Bonasila consists now of portions of three adult skulls, one male and two females, and of 13 bones of the male skeleton. All the specimens are more or less stained by manganese and iron and all are distinctly heavier than normal, showing some grade of fossilization. They closely resemble in all these respects the numerous animal bones from the bank and in all differ from the later surface burials of the place.