1897. 



Ordo IX. yTillodontia, Zittel, 1893. 

 Tillodontia et Taeniodonta, Cope. 

 Subordo I. Tillodontia. 



J. L. "Wortmaim, Caracters of the Tillodontia, — Bull. Am. Mus. 

 Nat. Hist.. IX. p. 61. 



Familia I. rEsthonycidae. 



761. tEsthonyx, Cope, 1874. 



4086. ybisulcatus. Cope, [Final] Report Ext. Vert. 

 New-Mexico, Exp.West 100 Mer., 1877, 

 p. 154, pl. 40. tig. 27—33. 



4087.jacer. Cope, Aun. Rep. U. S. Geol. Surv.. 

 1874. p. 119. 



4088.TBurmeisteri. Cope, Report Yert. Foss. 

 New-Mexico, 1874, p. 7; [Final] Report, 

 1877, p. 156; Tert. Yert. 1884. p. 204, 

 pl.24c, fig.l— 10. 



j-Eocaen. 

 Nov.-Mexico. 



fEocaen. 

 Nov.-Mexico. 



f Eocaen. 

 Nov.-Mexico. 



4089. f acutidens, Cope, Bull.Geol.SvuT., 1881. fEocaen. Wyoming. 

 p.185; TeriVert., 1884, p. 210, pl, 24 a , 



fig. 17 — 21. . Vi„* "fc-#. ->:•■< 



4"9<".Tspatularius, Cope, Amer. Natur., 1880/ y , | f.Ec i caen. Wv,ojnmg. 

 p.908; Tert. Yert.. 1884, p. 211, pl. 24$ 

 tig. 22-25. Xq *^\*gZ}' y 



7<i2. iPlatychoerops, Charlesw., 1855. 



Miolophus, Owen, 1865. 



4091.TRichardsoni 7 Charlesw., Rep.Brit.Ass.for fEocaen. Europa, 

 1854 (1855), p. 80. Insul. Britannia. ' 



planiceps, Owen, Geol. Mag., II, 1865, » 



p. 339, pl. X. 



