PEAT i Xxc. 
MIocENE CARNIVORA AND RopEentTIA. HUMAN TOOTH FOUND WITH 
Miocene FossIts 
Nomenclature 
Cope 1880-3 Revised 1915 
Canis brachypus Cynodesmus brachypus 
Tomarctus brevirostris Tomarctus brevirostris 
Lutra lycopotamica ?Sthenictis lycopotamicus 
Castor Dipoides ?tortus 
Mylagaulus monodon Mylagaulus monodon 
Mylagaulus sesquipedalis Mylagaulus sesquipedalis 
Palzolagus Lepus sp. 
Homo Homo ?sapiens 
Figs. 1-3. Cynodesmus brachypus (Cope, 1881). Parts of type skeleton figured on pl. CXTXb. 
Miocene, East of Laramie Peak, Wyo. Fig. 1, pelvis sacrum and adjoining 
vertebrae, side view, about three-fifths natural size; la ventral view of pelvis. 
Fig. 2, 2a, 2b, metacarpal, dorsal, external and internal views. Fig. 3, proximal 
phalanx, dorsal, lateral and proximal views. 
Fie. 4. Tomarctus brevirostris Cope, 1873. Lower jaw, type specimen, Amer. Mus. No. 8302, 
Cope Coll., internal and superior views, natural size. Middle Miocene, Pawnee 
Creek beds near Pawnee Buttes, Colorado. 
The systematic position of this genus is doubtful. The type is an immature 
jaw, the carnassial about half emerged, and the anterior part of the jaw so broken 
that it is not at all certain that the premolars were, as Cope considered them, 
reduced in number. 
Fic. 5. 2Sthenictis lycopotamica (Cope, 1879). Lower jaw, type specimen, internal and superior 
views. From Pawnee Creek beds (Middle Miocene) of northeastern Colorado. 
The original has been lost. Professor Cope’s descriptions have not sufficed to 
determine the affinities of this species, which he referred to Potamogale (Lutric- 
tis=). It appears to be related to ‘“Stenogale’’ robusta, Cope, which Peterson 
has (1910) made the type of Sthenictis. 
Fras. 6-9. Dipoides sp. Figs. 6, 6a, lower jaw, Amer. Mus. No. 8332, Cope Coll., external and 
superior views; Fig. 7, lower incisor, external view; Fig. 8, humerus, anterior 
view, Fig. 9, caudal vertebra, superior view; all natural size. Republican River 
beds, northwestern Kansas. 
Fig. 10. Mylagaulus monodon Cope, 1881. Lower premolar, p. 4, Am. Mus. No. 8828, Cope 
Coll. Natural size. Republican River bed, Kansas. 
Fie. 11. Mylagaulus monodon Cope, 1881. Lower jaw, type specimen, Amer. Mus. No. 8327, 
Cope Coll. External, internal and superior views, natural size. Republican 
River beds, Driftwood Creek, Hitchcock Co., Neb. 
Fic. 12. Mylagaulus sesquipedalis Cope, 1878. Upper premolar, p. 4. 
Fig. 13. Lepus sp. Lower jaw, Amer. Mus. No. 8335, Cope Coll. External and superior 
views, natural size. Republican River beds, Driftwood Creek, Hitchcock Co., 
Neb. 
Fig. 14. Homo ? sapiens. Human tooth found in association with upper Miocene mammals. 
Amer. Mus. No. 8304, Cope Coll. Republican River beds, northwestern Kansas. 
This tooth was collected by Professor Cope’s party on the ‘‘ Loup Fork” (Republi- 

