A very remarkable showing is that of the percentage relation of the female to male skull size in the three large groupings. In the first two it is identical, in the third it differs less than could confidently be expected among the closest relatives. Another remarkable fact is that this important relation is found to be much like that in the Eskimo in various groups of Indians; thus it was _96_ in the Indians of Arkansas and Louisiana,[4] _95.5_ in the Munsee of New Jersey,[146] and _96.4_ in the Indian skulls of California.[147] But it is only _93.6_ in the Sioux (52 male, 40 female skulls) and differs more or less also in other tribes and peoples. A comprehensive study of this relation, with due respect to age, will some day well repay the effort. ESKIMO: CRANIAL MODULE ((L+B+H)/3) MALES IN ASCENDING ORDER _Southwestern and midwestern_ Males Females (5) (7) Togiak 15.21 14.73 (4) (6) Mumtrak 15.22 14.68 (3) (2) Southwestern Alaska 15.25 14.90 (9) (4) Hooper Bay 15.30 14.68 (8) (6) St. Michael Island 15.30 14.72 (5) (7) Little Diomede Island 15.33 15.09 Pastolik and Yukon (14) (20) Delta 15.34 14.83 (145) (128) St. Lawrence Island 15.42 14.27 Golovnin Bay to Cape (4) (2) Nome 15.52 14.65 (46) (70) Nunivak Island 15.53 14.90 (13) (16) Indian Point (Siberia) 15.54 14.88 (3) (2) Chukchee 15.56 15.05 (4) (1) Port Clarence 15.57 (14.57) (9) (16) Nelson Island 15.59 14.64 (3) (3) Pilot Station, Yukon 15.91 15 General averages, (275) (290) approximately _15.44_ _14.77_ Females vs. males (M = 100) _95.7_ _Northwestern_