Smithsonian miscellaneous collections . SMITHSONIAN MISCELLANEOUS COLLECTIONS VoL 121, No. 10, PI. 3. TiLuoDONT Skull from the Bridger Middle Eocene Trogosns liyracoidcs (Marsh) : Skull ( No. 17886), ventral one-half natural size. SMITHSONIAN MISCELLANEOUS COLLECTIONS VoL 121, No. 10, PI. 4 w^^

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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience