U. S. GEOLOGICAL SUBVEY 



MONOGRAPH 55 PLATE LXXXI 



UPPER DENTITION OF EOTITANOTHERIUM OSBORNI AND DIPLACODON ELATUS 



(After Peterson; see p. 435.) Drawings by Sidney Prentiss. One-hajf natural sise. A, Eotitanotherium osborni^ type (Carnegie 

 Mus. 2859), upper ja-%v and dentition. B, Diplacodon elatus, type (Yale Mus. 11180), upper dentition 



101959— 29— VOL 2 17 



