EVOLUTION OF THE SKELETON OF EOCENE AND OLIGOCENE TITANOTHERES 



697 



Figure 639. — Pes of Oligocene titanotheres 



A, Broniops rohustus, Yale Mus. 12048 (type); B, Diploclonus tyleri, Amherst Mus. 327 (type); C, Menoiusf heloceras, Am. Mus. 1080; D, 

 Menodus Irigonoceras, Am. Mus. 1079; E, BTontotherium hatcherif, Am. Mus. 1047; F, Brontotheriumf gigas, Yale Mus., after Marsh. One- 

 eighth natural size. The pes of Menodus is very narrow, that of Broniothenum is very short and broad; the others are of intermediate type . 



