(9) Smith Sound 82.7 (13) Southampton Island 83.7 (7) Hudson Bay and vicinity 84.4 (23) Baffin Land and vicinity 85.7 (89) Greenland 85.9 (10) Northern Arctic 86.5 Sex differences in the index are small, nevertheless the females tend to show a slightly higher index, due to relatively slightly smaller breadth of the arch. The size of the arch and its index differ but little over the three main areas of the Eskimo territory, yet there are slight differences. They appear plainly in the following table. Notwithstanding the fact that on the whole the southwestern and midwestern groups are somewhat taller than those of the far north and northeast, the largest palate, in the males at least, is found in the latter area. In the southwest and midwest the upper alveolar arch is relatively (as well as absolutely, barring one group) somewhat broad and short. This may be in correlation with the broader head in this area, just as the absolutely slightly longer palates over the rest of the Eskimo territory and particularly (in males) in the northeast may correlate with the longer heads in those regions. This point may be tested on our splendid material from St. Lawrence Island. Taking the broadest and the narrowest skulls from this locality, the following data are obtained for the proportions of the upper dental arch: ESKIMO CRANIA: DENTAL ARCH AND FORM OF SKULL ST. LAWRENCE ISLAND MATERIAL