PLATE XX. 



TEETH OF EQUIDiE OP THE BLANCO EPOCH, NATURAL SIZE. 



Figure 1. Superior molar of JEquus simplicidens. Cope; grinding face, from 



below; a, lateral face. 

 Figure 2. Equus simplicidens^ Cope ; inferior molars, grinding face, from above. 

 Figure 3. Equus simplicidens, Cope; inferior m. ii. side view; from a different 



individual from those figured in figures 1 and 2. 

 Figure 4. Equus occidentalism Leidy ; two inferior molars from above ; from Fos- 

 sil Lake, Oregon. 

 Figure 5. Equus occidentalism Leidy; probably temporary inferior molar from 



above; from Fossil Lake, Oregon. 

 Figure ft. Equus eurystylus, Cope; inferior molar, grinding surface, the right 



extremity too short, see plate; a. lateral view of same; from Paloduro 



Canyon. 

 Figure 7. ^^mms CMTOmmsii, Cope; left superior molar. 

 Figure 8. Equus minutus, Cope; inferior molar, grinding face; a, internal; b, 



external views. 

 Figure 9. Equus sp. ; part of right superior molar, from Paloduro Canyon. 



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