The skull as a whole was evidently mesocephalic, and neither low nor very high. The thickness of the frontal is about medium for an Indian.

The face is of medium proportions and strength, with rather large orbits, good interorbital breadth, medium malars, medium broad nose, and but moderate alveolar prognathism. The nasal bridge is not high, nasal bones fairly broad, spine moderate, lower borders well defined though not sharp. The sub-malar (canine) fossae are shallow.

The condyloid process of the lower jaw is high, mandibular notch deep. The whole jaw is strong but not thick or massive. It is Indianlike, not Eskimoid, in all its features. The teeth are of good medium size.

Skull No. 333383.—Of this skull I brought the right parietal with about one-third of the frontal; Mr. Krieger, a year later, the remainder of the frontal. Other parts are missing.

The specimen was evidently, a good-size female skull, normal, undeformed, probably mesocephalic in form, and moderately high. The thickness of the bones is not above moderate.

Skull No. 333950.—Of the third skull, recovered from the sands of the beach at low water in 1927 by Mr. Lawrence, there are only the two parietals. The specimen is that of a young adult female. The bones, rather submedium in thickness, indicate a skull of slightly smaller size and slightly shorter than the preceding but of much the same general type.

The skeletal parts of male No. 332513.—Humeri: The long bones all give the impression of straightness, length, and of a certain gracility of form combined with strength, but without massiveness. The right humerus presents a small but distinct supracondylar process, a rarity among Indians. The fossae are not perforated. Measurements:

The shaft approaches type IV (quadrilateral). There is but small curvature.

Right ulna: Lacks the olecranon; shaft prismatic, with anterior and posterior surfaces fluted; but a moderate curvature backward upper third.

The bones, especially the right, are remarkable for their graceful form and approach to straightness. The linea aspera is high but not massive or rough.

Right tibia: Length (?), extremities wanting. A moderate physiological curvature forward, middle third.

The bone is distinctly platycnaemic, as the femora are platymeric and the humeri platybrachic, a harmony of characters which is often met with in the continental Indian.

ADDITIONAL PARTS

These include four ribs, the atlas and two lumbar vertebræ. The first rib approaches the semicircular in type and is rather large, indicating a spacious chest. Otherwise there is nothing special.

A comparison of the long bones of this interesting skeleton with those of the later Indians from the same and near-by localities as well as with those of the western Eskimo (see table, p. 160) shows a number of striking conditions. The length of the bones of the skeleton is far above the mean of both those of Indians and the Eskimo, indicating a stature of at least 10 centimeters (4 inches) higher. In none of their characteristics are the bones near to those of the Eskimo, making it doubly certain that the subject was not of that affiliation. Compared with those of the later Indians of the same territory, the bones show in one line remarkable differences, in another remarkable likenesses. The differences concern all the relative proportions of the shafts—the bones of the old skeleton give without exception indices that are markedly lower; they are distinctly more platybrachic, platymeric, and platycnaemic. But the more basic humero-femoral and radio-humeral indices are practically the same; showing fundamental identity. The humero-femoral index is especially important in this case. It is exceptionally high in the Yukon Indians, due to a relatively long humerus, and the same condition is seen in the old skeleton. It seems safe, therefore, to conclude that the owner of the old skeleton was not only an Indian but an Indian of the same physical stock from which were derived the later Indians of the Yukon; but he was evidently of an earlier and different tribe or of a purer derivation than those who followed. To more fully establish and then trace this type, both as to its derivation and extension, will be tasks of future importance.

The Yukon Eskimo

THE LIVING

As with the Indians farther up the river, the necessities of the writer's journey did not permit more than visual observations, but in 1927 Henry B. Collins, jr., succeeded in measuring six adult males at Marshall.

In general, the people of the Yukon delta and from this to Paimute are true Eskimo. By this is meant that in the majority of individuals they can readily be told as a type apart from the Indian and belonging plainly to that of the extensive family of the Eskimo. But when the differences are to be defined the task is not easy; some of the distinguishing marks, though well appreciated, are somewhat intangible.

The physical differences are essentially those of the physiognomy. The head is neither narrow nor scaphoid, or even very high. The Indian face is more prominent and more sculptured; that of the Eskimo appears fuller, especially in the lower part, and flatter. Part of this is due to the bony structure, part to the differing amounts of fat. An eversion of the angles of the lower jaw, which is relatively frequent and sometimes excessive in the Eskimo male while almost absent in the Indian, may give the Eskimo face almost a square appearance. Take with this the seemingly somewhat low Eskimo forehead, the not very widely open and somewhat on the whole more slanting eye, and the characteristic Eskimo nose with its rather narrow and not prominent nasal bridge, the ridiculous monk-like cut of the hair (in the older males), the often rather full lips with, in the males, a tuft of sparse mustache above each corner of the mouth; add to all this a mostly smiling or ready-to-smile "full-moon" expression, and it would be impossible to take the subject for anything else than an Eskimo. The Indian's face is more set, less fat, in the males at least, less broad below, with seemingly a higher forehead, sensibly made-up hair, not seldom a bit more mustache, and a nose that generally is both broader and more prominent.

But the differences are less marked in the women and still less so in the children, especially where similarly combed and clothed. And there are, particularly on the Yukon, not a few of both Indian and Eskimo who even an expert is at a loss where to class. They may be due to old mixtures; no new ones are taking place; but it seems that there may be present another important factor, that of a far-back related parentage.

In the color of the skin and eyes, in the color and nature of the hair, there is no marked difference between the two peoples of the Yukon. In stature the Eskimos are slightly higher.

MEASUREMENTS ON LIVING YUKON ESKIMO

The exact provenience of the six men measured at Marshall is uncertain, but they seemingly were all from the lower Yukon and all were apparently full-blood Eskimo. But the measurements are rather peculiar. They are given, for comparison, with those of the western Eskimo in general (p. 165). They approach nearest to those of the Togiak Eskimo, well down below the Kuskokwim. They show a higher stature than all of their relations farther south, except the Togiaks, and they have a rounder head. They are, in fact, moderate brachycephals, a very unexpected form in this strain of people. The Togiaks also are brachycephalic. The vault is relatively somewhat higher than it is in the other groups, though the height is not excessive. The nose is slightly lower as well as narrower than it is in all the other contingents. The face is close to those of St. Lawrence Island. The ear is perceptibly smaller and especially narrower than elsewhere, but perhaps the age factor enters into the case. The hand is much like that of Togiak and St. Lawrence, the index being identical.

The brachycephaly of the group for the present is hard to explain. It can not be ascribed to a mixture with the river Indians, for these, as has been seen from the skulls, were meso- rather than brachycephalic. There is need here for further inquiry.

SKELETAL REMAINS OF YUKON ESKIMO

As with the Indian, such remains are still rare. Some measurements of three "Smithsonian Mahlemute" skulls from the Yukon, collected by William H. Dall, are given by Jeffries Wyman, and probably the same specimens appear in the Otis Catalogue, the measurements in which are regrettably not very reliable. These specimens can not now be located, and the scarce data are of but little value. The three skulls examined by Wyman were all mesocephalic.

It is now possible to report on 40 adult skulls from the lower Yukon and the delta. An abstract of the measurements is given in the next table. The data indicate a considerable local variation. All the skulls, or very nearly all, are mesocephalic; but they differ considerably in height and in all the facial features. The Pilot Station group, from the apex of the delta, and hence the midst of the Eskimo territory on the Yukon, is especially peculiar. Both the vault and the face, in the series as a whole, range from low to high, and much the same is true of the height of the nose and that of the orbits, while the palate is exceptionally broad, giving a low index, all of which would seem to indicate instability or conditions in change, together probably with admixtures from farther up the river. We need more material, particularly from the stretch of the river between the apex of the delta and Paimute.

SKELETAL PARTS OF THE YUKON ESKIMO

The next table gives the measurements of the long bones in both sexes in the Yukon Indian (for comparison), in the Yukon Eskimo, and in the western Eskimo, the latter coming mainly from the coast south of the Yukon and from the Nunivak and St. Lawrence Islands. The Yukon Eskimo material, collected from intact burials by the writer, is unfortunately limited to the northern mouth of the river. The skeletons from St. Lawrence Island were collected on the Smithsonian expedition to the place in 1912 by Riley D. Moore, 1927 expedition by H. B. Collins, jr., and T. D. Stewart, all of the National Museum.

The Yukon Eskimo show perceptibly longer bones than do either the Indians or the southeastern and midwestern Eskimo, indicating a somewhat taller stature.

The humerus in the males is less broad than either in the Indians or the midwestern and southwestern Eskimo and has as a consequence high shaft index; but in the females the index in the Yukon and western Eskimo series is identical. The radius is relatively even shorter in the Yukon that it is in the other Eskimo, giving low radio-humeral index.

The femur is notably less platymeric in the male and slightly less so in the female Yukon Eskimo than it is in both the Indians and the rest of the southwestern and midwestern Eskimo, giving a higher index at the upper flattening. The meaning of these facts is not obvious and they may undergo some modification with more material.

As to strength, measured by the mean diameter of the shafts, the Yukon Eskimo in comparison to the southwestern and midwestern show a slightly weaker humerus, and in the males a slightly weaker femur at middle, but in the males again, a slightly stronger tibia. If, however, the mean diameters of the bones are taken in relation to the length of the bones, then in both sexes and in all the parts the southwestern and midwestern Eskimo are slightly stronger. This would seem to indicate more exertion, with harder life, among the coastal and insular than among the river Eskimo. As a matter of fact Kotlik and the near-by Pastolik, from which our skeletons came, were favorably situated at the northern mouth of the river.

The Yukon Eskimo females, as compared with the males, have a somewhat weaker and especially somewhat flatter humerus, with a consequently lower shaft index; they have relatively even a shorter radius, giving a lower radio-humeral index; their humerus itself is relatively short, giving a lower humero-femoral index; their femur is relatively somewhat flatter at the upper flattening, giving a lower index of platymery; while their tibia is relatively less strong antero-posteriorly, resulting in an index that is more than four points higher than that of the males.