Ordo IX. f Tillodontia. *) 
Familia I. f Esthonycidae. 
889. fEsthonyx, Cope, 1874. 
Cope, Rep. Vert. Foss. New-Mexico, 1874, p. 6. 
5584. f bisulcatus, Cope — ( 4086 ). fEocaen.Novo-Mexico. 
5585. f acer, Cope — ( 4087 ). fEocaen.Novo-Mexico. 
5586. f burmeisteri, Cope — ( 4088 ). fEocaen.Novo-Mexico. 
Wyoming. 
5587. f acutidens, Cope — ( 4080 ); Ameghino, f Eocaen. Woyming. 
Aual. Mus. Buenos-Aires, 1904, p. 414, 
f. 541. 
5588. f spatularius, Cope (40.90). f Eocaen. Woyming. 
890. f Platychoerops, Charlesw., 1855. 
Myoloplms , Owen, 1865. 
Charlesworth, Rep. Brit. Ass. Adv. Science, 1854 (1855), p. 80. 
5589. f richardsoni, Charlesw. — ( 4001 ). f Eocaen. I. Britannia. 
Familia II. f Anchippodontidae. 
Tillotheridae, Trt., 1897. 
891. f Anchippodus, Leidy, 1868. 
Trogoms, Leidy, 1871; Palaeosyops , p., Marsh, 1871. 
Leidy, Proc. Acad. Nat. Sc. Philad., 1868, p. 232. 
5590. f riparius, Leidy — ( 4092 ). f Eocaen. America 
Sept., New-Jersey. 
! ) Ameghino considere cet Ordre comme appartenant au grand groupe 
des Ungulata, bien que les pattes fussent munies de griffes et non de sabots. 
(Anal. Mus. Buenos-Aires, 1904, p. 403 et seq.) 
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