Jacob Lawson Wortman

Up to the present time but very little has been known of the existence of the peculiarly American family Procyonidæ in any deposits older than the very latest Quaternary. Leidy has described and figured an isolated last upper tooth, from the Loup Fork deposits of Nebraska, under the name of Leptarctus primus, which has been referred to this family. The Museum Expedition of last year into this region... more...