EVOLUTION OF THE SKELETON OF EOCENE AND OLIGOCENE TITANOTHERES 



605 



Figure 512. — Manus of lower and middle Eocene titanotheres 



A, LamhdotheTium popoagicum; B, Eotitanops princeps; C, Limnohyops monoconus: D, Palaeosyops leidyi; E, Mante\ 

 F, MesaiirMnus petersoni. One-tliird natural size. 



, ,, ^si_S^ \j:^ ABC 



Bi W^ Ci Dr 



Figure 513.— Comparison of the right scaphoid in middle Eocene Figure 514.— Terminal phalanges of the manus in middle Eocene 



titanotheres titanotheres and amynodonts 



Lower row, front view; upper row, top view. A, Palaeosyops leidyi: B, Limnohyops Generic differences in the terminal (ungual) phalanges of the third digit. A, 



monoconus; C, MesatirUnus petersoni: D, Manieoceras manteoceras. One-half nat- Mesatirhinus petersonit: B, Manteoceras manteoceras: C, Limnohyops monoconus?: 



jifal gijg_ D, Palaeosyops sp.; E, Amynodon sp. One-halt natural size. 



