154 Bulletin American Museum of Natural History. (Vol. XVI,

its larger size, longer and heavier antlers, and in the large size
of the white rump patch. This patch, measured across the
base of the tail, has a breadth of 250 mm., but is divided
through the ‘middle by the dark band, 50 mm. wide, that

Fig. 3. Rangifer montanus, $ad., No. 17971, Gold Range Mountains, B.C. 7 nat. size.

passes down the tail, the white patch being thus separated
into two areas, each with a transverse width of roo mm.

The relationship of R. osborni to R. montanus is considered
below.

In this connection it is due Mr. Madison Grant to state that