Article XV.—DESCRIPTION OF A NEW CARIBOU FROM NORTHERN BRITISH COLUMBIA, AND RE- MARKS ON RANGIFER MONTANUS. By J. A. ALLEN. A series of Caribou collected by Mr. Andrew J. Stone for the American Museum in the Cassiar Mountains, northern British Columbia, September 15-26, 1897, were provisionally referred by me to Rangijer montanus,’ described in August, 1899, by Mr. Ernest Seton-Thompson ? from a mounted specimen in the Museum of the Canadian Geological Survey, ‘“‘taken in the Illecillewaet watershed, near Revelstoke, Selkirk Range, B. C.,in 1889.’ A series of four specimens, two fine adult males and two fine adult females, taken September 26, tg01, have just been received by the Museum, collected in the Gold Range Mountains, twenty-five miles southeast of Sicamous, and are thus practically topotypes of Rangifer montanus. These specimens show that the Caribou from the Cassiar Mountains is very different from Rangifer montanus of the Sel- kirks. The specimens of the two series having both been taken during the last half of September, they are strictly comparable as regards season. Rangifer osborni, sp. nov. Rangtfer montanus ALLEN, Bull. Am. Mus. Nat. Hist., XIII, 1900, Art. I., pp. 1-18, figs. 2-6, 11, 15, and 16. Not Rangifer montanus Seton-Thompson. Type, No. 15714, 6 ad., Cassiar Mountains, British Columbia, Sept., 1897; Andrew J. Stone (James M. Constable Expedition). The largest of all known Caribou, with very long and very heavy antlers, which have a low and very long backward sweep. Adult Male, in September.’—General color above clove-brown, dark- est on the head, back, thighs, and lower edge of the-sides of the chest, and still darker, blackish brown, on the breast and limbs; muzzle, in- cluding the whole end of the nose and front border of the lower lip, 1 This Bulletin, Vol. XIII, 1900, pp. 1-18, April 3, 1900. 2‘Preliminary Description of a New Caribou,’ The Ottawa Naturalist, XIII, Au- gust, 1899, PDE20;-120. Aye description and measurements are from my former paper (J. ¢., pp. 5 and 6). [149]