PLATE CIV. 
Limp Bones oF OLIGOCENE RHINOCEROSES 
Nomenclature 
Cope 1880-3 Revised 1915 
Aceratherium occidentale Ceenopus (= Subhyracodon) mitis 
Aceratherium pacificum Diceratherium pacificum 
Figs. 1-2. Canopus mitis (Cope, 1874). Femur tibia and fibula, part of type specimen figured 
on pl.ev. Amer. Mus. No. 6325, Cope Coll., Horsetail Creek beds (Titanotherium 
zone), Logan Co., Colorado. 
Fies. 3-4. Diceratherium pacificum (Leidy, 1871). Femur and tibia with foot bones figured 
on pl.ev. Amer. Mus. No. 7340, Cope Coll., John Day formation of Oregon. 
All figures are two-fifths natural size. 
