PLATE 33 



PLIOHIPPUS AND HIPPARION FROM THE LOWER PLIOCENE OF NORTHERN TEXAS. 



All figures natural size. 



Type specimens from the Clarendon formation, Texas, described by Professor Cope in 1892-3. Originals loaned for 

 study from the collection of the University of Texas through the courtesy of Professor F. W. Simonds. 



Palo Duro Canon, Texas Lower Pliocene 1, 2, 3. Hipparion eurystyle Cope, Univ. of Texas coll. Lower molar teeth. 



These are the teeth figured by Cope as paratypes. See text Fig. 149, 

 7-8b. 1, Crown view, a, outer view, b, inner view; 2, crown view, 

 a, outer view, b, inner view; 3, crown view; 4, crown view, b, 

 inner view. 



" " " " " " 4. H. eurystyle Cope, type, Univ. of Texas coll. Lower molar tooth. This 



is the tooth figured by Cope as his type. See text Fig. 149, 6, 6a. 



" " " " " 5. Hipparion lenticulare Cope, Univ. of Texas coll. Right upper molar of 



type. 5, crown view, a, outer view, d, posterior view. Figured by 

 Cope 1889. See text Fig. 147, 1. 



" " " " 6,7. Hipparion lenticulare Cope, Univ. of Tex. coll., left upper molar of type. 



6, Crown view, d, posterior, a, external view. Figured by Cope, 

 1889. See text Fig. 147, 2. 7, anterior view. 

 Mt. Blanco, " Middle " 8. Pliohippus minutus Cope (= Equus phl&gon Hay), type lower molar, 



Univ. of Tex. Coll. 8, Crown view, a, external view, b, inner view. 



288 



