686 



TITANOTHERES OF ANCIENT WYOMING, DAKOTA, AND NEBRASKA 



FiGTJRB 618. — Cervical and first four dorsal vertebrae of Brontops robustus and Menodus giganteus 



A, B. robustus, vertebrae of type (Yale Mus. 12048); B, M. giganteus, vertebrae associated with skull in the Field Museum (P 5927). 



Both one-eighth natural size. 



