ome saicces OR RECENT =eF 
: a a ait Rae. Pa Bz sh 
LOWER OLIGOCENE “T0000 VRS ee ane 
Mites Ke > 
LOWER cOCENt aR alti a) 
— 
oat Ro ee | 
SUPPOSED TYPE UNDISCOV- PROTORONIPPUS MESOHIPPUS MESONIPPUS HIPPOTHE RIUM KOUUS EXCELSUS fOWS CADALLUS LINN 
“ERED ANCESTOR VENTICOLUS , COPE BAIPDI, LEIDY PRALSTANS COPE ISONESUM «COPE LOIDY DOMESTIC NoRSE 
Copyrighted tqoo by the S. S, McClure Co. 
EVOLUTION OF THE HORSE.~SKULL, FOREFUOT AND HIND FOOT 
Stages of progress in the Ancestors of the Modern Horse. The diagram was based entirely on specimens in the American Museum 
(From “Animals of the Past’ by F. A. Lucas. By permission of McClure, Phillips & Co.) 
7 
