class="mids">Height
of skull

Clethrionomys gapperi solus, Loring ♂type 133 33 20 22.3 12.5 10.9 6.8 5.1 3.4 5.3 9.0 ♂ 5 av. 131 34 20 22 12.7 10.8 6.8 5.3 3.5 5.1 9.1 min. 128 33 19 21.8 12.5 10.5 6.7 5.1 3.3 5.0 8.9 max. 133 36 20 22.3 13.0 11.2 7.1 5.5 3.6 5.3 9.5 ♀ 5 av. 128 34 19 21.3 12.5 10.5 6.5 5.4 3.5 4.9 9.2 min. 124 31 19 20.9 12.3 10.3 6.0 5.2 3.3 4.8 8.9 max. 140 36 20 21.7 12.7 10.7 7.0 5.6 3.6 5.0 9.5 Clethrionomys gapperi stikinensis, Stikine River at Great Glacier ♂ type 145 39 20 23.2 13.9 11.4 7.3 5.0 3.1 5.5 9.5 ♂ 4 av. 136 5 20 22.2 13.0 11.1 6.8 5.2 3.4 5.2 9.4 min. 132 33 19 21.5 12.3 10.7 6.5 5.0 3.1 5.1 9.1 max. 145 39 20 23.2 13.9 11.4 7.3 5.6 3.5 5.5 9.7 ♀ 7 av. 134 33 19 21.8 12.7^6* 10.9 7.0 5.4 3.4 5.1 9.5 min. 125 30 19 21.5 12.5 10.5 6.7 5.3 3.2 5.0 9.2 max. 147 35 20 22.2 12.9 11.3 7.1 5.6 3.7 5.3 9.8 Clethrionomys gapperi wrangeli, Wrangell ♂9 av. 139 36 19 23.4⁸ 13.3 11.4⁸ 7.3 5.6 3.6 5.6 9.6⁸ min. 130 31 18 22.9 13.0 10.9 7.1 5.5 3.3 5.4 9.2 max. 151 43 20 23.9 13.7 11.8 7.6 5.8 4.0 5.8 10.1 ♀ 16 av. 134 34 18¹⁵ 23.2 13.3 11.2¹³ 7.3 5.8 3.5 5.5 9.4 min. 123 28 17 22.4 12.6 10.7 6.9 5.5 3.2 5.2 9.0 max. 156 45 20 24.1 14.1 11.8 8.0 6.1 3.7 5.9 9.7 Clethrionomys gapperi phaeus, Chickamin River ♂ 5 av. 148 47 20 23.0⁴ 13.7⁴ 11.3⁴ 7.5⁴ 5.3⁴ 3.5⁴ 5.3⁴ 9.7³ min. 138 38 20 22.3 13.0 11.1 7.1 5.3 3.4 4.9 9.3 max. 159 51 21 23.8 14.6 11.8 7.7 5.6 3.8 5.6 10.0 ♀ 4 av. 153 49 20 23.1³ 13.4 11.2³ 7.6³ 5.2 3.7 5.3 9.6³ min. 140 44 20 22.4 12.8 10.8 7.3 5.0 3.4 5.1 9.2 max. 164 56 20 24.2 13.6 11.4 7.7 5.3 3.9 5.5 9.8

^*Superior numbers denote the number of individuals averaged.

Measurements.—External and cranial measurements of adults are given in table 1.

Remarks.—Morphologically C. g. stikinensis shows greater resemblance to C. g. solus of Revillagigedo Island, than to the geographically adjacent subspecies C. g. wrangeli and C. g. phaeus. Possibly the original stock of C. g. solus was rafted to Revillagigedo Island from the Cleveland Peninsula.

Hanson (Trans. Wisconsin Acad. Sci., Arts, and Letters, 36:124, 1944) reported two pine mice from near Prairie du Sac, in Westpoint Township, Columbia County, Wisconsin, as Pitymys pinetorum scalopsoides but cast doubt upon their subspecific identity. He also reported pine mice from Blue Mounds, Dane County, Wisconsin. We have examined these specimens (Westpoint, Columbia County, 2—No. 544, skin only, UWDEZ, and No. 521, skin only, H. C. Hanson's private collection; Westpoint, Dane County, 1, No. 11620, UWZM; Vermont, Dane County, 2, Nos. 11674 and 11694, UWZM) and have compared them with topotypes of P. p. schmidti, and with specimens of P. p. nemoralis and P. p. scalopsoides. The specimens from Columbia and Dane counties differ from P. p. schmidti in the greater zygomatic breadth, and lesser height of skull. They differ from P. p. nemoralis of comparable age in shorter tooth-row and generally smaller skull. The interorbital region,