PLATE 24. 



TEETH OF PROTOHIPPUS AND PLIOHIPPUS FROM NORTHERN TEXAS. 

 TYPE SPECIMENS FROM THE CLARENDON AND BLANCO BEDS OF TEXAS OF SPECIES DESCRIBED BY E. D. COPE IN 1892-3. 



All figures natural size. 



Texas Lower Pliocene 1. Pliohippus fossulatus Cope, type, Univ. of Texas Coll. (cast Am. Mus. 14395), 



p 3 -m 3 , moderately worn, a, External view, c, anterior view. 

 2, 2a. Protohippus pachyops Cope, Univ. of Texas Coll. (cast Am. Mus. 14394), upper 

 and lower milk dentition of type skull, dp 2 -m 2 , dp 4 -m 2 , moderately worn. 

 Middle " 3, 4. Pliohippus cumminsii Cope, type, Univ. of Texas Coll. (cast Am. Mus. 14393), 



upper molars, 3, 4, crown and, d, posterior views. 

 " " 5. Pliohippus simplicidens Cope, type, Univ. of Texas Coll. (cast Am. Mus. 14388), 



upper molar, a, External, c, anterior, and crown views. 

 " " " 6. Pliohippus interpolate Cope, type, Univ. of Texas Coll. (cast Am. Mus. 14387), m 2 . 



d, posterior, o, external and crown views. 



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