IXDKX 



Pdyt numhtrx nf tlliislnituni!- 



• t in httirii Jure tupr 



AdaptaticMi to (MiviroiinuMit. 30. ;V2 



A^c (lotormination l)y tcctli. ')! 



Aurhit/wriiini, 17 



Aral)i:ui horso. 13. 40. 44-4.') 



Ass. 11; African wild. 13. 32 



" Hy(Ml('\- 'I'urk," 4.") 



('u\i(M-. liaroii. 17 



Darley Arabian, 4o 



Dental battery of adult liorse, 59 



Dental star. 49. .")! 



Desert type, 13 



Diadinphorus, 33, 34 



Doiiiestic horse, Origin of, 39 



Draft horse, 38, 39, 40. 41-43, 42 



Eohippus, 10. 11, 15-16. 29, 31; venti- 

 colus, 18 



Epihippus, 10, 29 



Equus, 10, 11, 12, 13, 22-23, 31; asinus, 

 9, 14; burchelli, 9; caballus, 29; com- 

 plicatus, 29; grevyi, 9; hemionvs, 9; 

 lihycus, 39; przewalskii, 13, 41; scotti, 

 12, 23, 24; stenonis, 29; zebra, 9 



Equus Beds, 13 



Evolution, Cause of, 32; Parallel, 33-34 



Evolution of the Horse, 8, 14, 36-37; 

 of fore foot, 10; of fore leg, 27; of 

 hind foot, 11, 31; of hind leg, 28 



Ewart, J. C, 39, 43 



Foot, Evolution of, 10, 11 



Forest type, 13 



Fossil horses, 12-13 



Four-toed horses, 14-17 



Geological range of ancestors of horse, 26 



Gidley. J. W., 12 



Godolphin Arabian, 45 



Granger, Walter, 16 



Hipparion, 21, 29, 31; ichitneyi, 19, 21,22 



Hippidium, 13, 23, 25 



Huntington, Randolph, 40, 45 



Hypohippus, 17 



Hyracotherium, 14, 15, 28 



Keene, James R., 46 



"Kismet," 45 



Leg, Evolution of, 27, 28 



Libyan horse, 44-45 



Litopterna, 33 



Meaning of change in feet and teeth, 

 2()-30 



Mcryrhippns, 10, 11, 20, 29. 31 



.\fe.sohippns, 10, 11, 17, 31; 

 bairdi, 18. 29 



Miohippns, 17, 29, 31; interniediu.s, 17 



Molars, 9, 54, 58 



"Ximr," 40, 45 



Xor.seman's horse, 39, 41, 44 



One-toed horses, 22-23 



Orohippus, 16, 29 



Osborn, H. F., 13, 20, 21, 39, 45 



Owen, Richard, 14 



Paloeotherium, 17 



Parahippus, 20, 29 



Plagiolophus, 17 



Plateau type, 13 



Pliohippus, 21-22, 23 



Prehistoric man, 13, 39, 41 



Premolars, 54, 57 



Protohippus, 21-22 



Pseudo-horses, 34, 35 



Quagga, 13 



Race horse, 39, 45-46, 47 



Ridgeway, William, 39, 44 



Shetland pony, 38, 39, 43-44; com- 

 pared with draft horse, 33, 43 



Skeleton of horse and man, 4, 41 



Steppe tj'pe, 13 



"Sysonby," 46, 47 



Teeth of colt, 61 



Teeth of horse, 9, 48-63, 59; designa- 

 tion, 52-54; eruption of, 60-62; 

 evolution of, 29; pattern of enamel, 56 ; 

 shedding, 62, specialization, 49, struc- 

 ture, 48-50; wearing of, 49, 50, 55 



Teeth of Equus, 23, of Eohippus, 15, of 

 Epihippus, 16, of Hipparion, 21; of 

 Merychippus, 20, 21, oiMesohippus, 17; 

 of Orohippus, 16; of Parahippus, 20 



Thoatherium, 34 



Three-toed horses, 17-22 



Touchstone, S. F., 45 



Whitney, William C., 4, 40 



Wolf tooth, 54 



Wort man, J, L., 15 



Zebra, 11, 13, 32 



67 



