A fawn (No. 19235), a few weeks old, is grayish white on the head, ears, neck, limbs, ventral surface and sides of the body, the hairs being dusky basally and broadly tipped with white, the dusky basal portion showing through the white enough to give a general dingy effect. The top of the nose and a narrow band bordering the nostrils are blackish, passing posteriorly on the upper part of the rostrum into brownish dusky; a broad central band from the nose nearly to the ears is darker or more dingy than the sides of the face; a rusty brownish spot marks the point where the antlers are to appear, and there is a faint rusty wash on the sides of the face both before and behind the rusty antler spots. The back is marked by a strongly defined, very narrow, ferruginous line, running from the nape to the base of the tail, which, over the middle of the back, broadens a little and darkens to deep dusky ferruginous; the whole dorsal area, from a little behind the shoulders to the rump, is pale fawn colour, darkest medially and fading out on the sides to pale buffy white. This coloured area corresponds in position and outline with the dark dorsal patch of the adults. A narrow, ill-defined, dusky chestnut-brown band borders the hoofs of all the feet, but is rather broader and more distinct on the hind feet than on the fore feet. The tail is wholly white to the base, as in the adults. The adult specimens, though killed in June, are in winter coat, the hair being long, thick, and very soft, much softer and finer than in the Greenland Caribou, and the skins are also much thinner and softer. The skin of the fawn was preserved in brine, which may have slightly intensified or darkened the buffy shades of the dorsal surface. _Rangifer Pearyi_ is evidently a very distinct insular form, very different from _R. Grœnlandicus_ in colouration and doubtless in other features. Unfortunately only flat skins are available for examination. Specimens of _R. Grœnlandicus_ in corresponding pelage are dark slaty brown above, this colour fading gradually on the sides to the white of the ventral surface, the Greenland Caribou being very much darker in its winter pelage than the Newfoundland Caribou, which heretofore has been the whitest known form of the group.