(Map [24].)
1. Alton, Madison County.—In the collection of fossils made in the region about Alton by William McAdams, a list of which will be given on page [339], is a single upper right molar, the first or second, which belongs to this genus. The tooth has McAdams’s No. 11. To the base of the tooth a mass of very hard matrix adheres and a part of the grinding-surface is covered by the same material. The tooth is likewise somewhat shattered. The length of the tooth is 19 mm., the width across the anterior lobe 13.5 mm.
From the materials at hand it is not possible to determine to what species the tooth belonged. It is referred provisionally to Rangifer muscatinensis. This tooth differs from other Rangifer teeth observed in having the front of the protocone, at its base, less fully rounded out, and in that the mesostyle, on the inner face of the tooth, widens more extensively as it approaches the base than in any other species observed. Nevertheless, the width of the mesostyle varies in species and individuals.
WISCONSIN.
(Map [24].)
1. Menomonie, Dunn County.—From Professor S. Weidman, of the Wisconsin Geological and Natural History Survey, the writer received a part of an antler of a female or a young individual of some species of Rangifer. Professor Weidman sends the information that this was obtained in a sand formation just below the clays worked at Menomonie for brick. He regards the brick-clays as being of Sangamon interglacial age. He states, too, that a part of a leg-bone believed to belong to a mastodon had been found in the clays; also bones of a fish, which have been identified by Dr. Hussakof as the Mackinaw trout, Cristivomer namaycush (Jour. Geology, vol XXIV, pp. 685–689, figs. 1, 2).
Probably the caribou represented by this specimen lived in that region at the beginning or at the close of some one of the glacial stages, when the climate was yet severe. The supposed mastodon bone may have belonged to Elephas primigenius. It is described on page [111].
At a later time Dr. Weidman sent the writer a large part of the beam of an antler of a caribou which likewise had been found in the lacustrine clay at Menomonie. It was met with in the red clay, near the top of the lacustrine clay bed.
KENTUCKY.
(Map [24].)