324 THE OSTEOLOGY OF ELOTHERIUM. 
. Kowalevsky, W. Osteologie des Genus Entelodon Aym. Jbid., Bd. XXII, p 415. 
3. Leidy, J. The Ancient Fauna of Nebraska. Smithsonian Contributions to Knowledge, 1853. 
. Leidy, J. The Extinct Mammalian Fauna of Dakota and Nebraska, Phila., 1869. 
Marsh, O. C. Notice of New Tertiary Mammals. Pt. If Amer. Journ. Sci., 3d Ser., Vol. V. 
. Marsh, 0. C. Description of Miocene Mammalia. Ibid , Vol. 46. 
Marsh, O. OC. Restoration of Elotherium. Jbid., Vol. 47. 
Osborn, H. F. Fossil Mammals of the Uinta Basin. Bull. Amer Mus. Nat. History, Vol. VII. 
Pomel, A. Sur un nouveau Pachyderme du Bassin de la Gironde (Elotherium magnum). Bull Soc. Géol. de 
France, Tom. IV, 1846-7. 
Pomel, A. Sur un nouveau genre de Pachydermes Fossiles (Elotherium). Bibl. Univ. de Geneve. Tom. V, 1847. 
Schlosser, M. Beitrige zur Kenntniss der Stammesgeschichte der Hufthiere. Morph. Jahrb., Bl. XU. 
Scott, W. B. On the Osteology of Elotherium. Comte-Rend. d. Séances du 3me Congres Internat. de Zoologie, 
Leyden, 1896. 
. Zittel, K. A. Handbuch der Paleontologie, Bd. 1V, Munchen and Leipzig. 
EXPLANATION OF THE PLATES. 
Plate X VII. 
Skeleton of Hlotherium ingens Leidy, from the Titanotherium beds of South Dakota, about ;'; natural size. Only 
the eighth thoracic vertebra and the distal ends of certain ribs are conjectural. The tail may well have been considerably 
longer, as only the vertebre associated with the skeleton have been drawn. 
ig. 10. Hlotheriwm ingens. Right ulna and radius. 
Plate X VIII. 
1. Hlotherium mortoni. Basal view of skull, } nat. size. Ty, tympanic bone ; ¢, canal opening above and behind 
the posterior nares. 
. Hlotherium mortoni. Occiput from behind, ; nat. size. 
. Hlotheriwm ingens. Atlas, ventral side. 
. Hlotherium ingens Axis, left side. 
. Elotherium ingens. Fifth thoracic vertebra, from the front. 
. Hlotherium ingens. Last lumbar vertebra, from behind. ¢s, episphenial process. 
. Hlotheriwn ingens. Anterior caudal vertebra, from above. 
Elotherium ingens. (?) Fifth caudal vertebra, left side. 
OMIA AK WW 
. Hlotherium ingens. Posterior caudal. 
ig. 11. Hlotheriwm ingens. Right manus. ii, second metacarpal (conjectural) ; v, fifth’ metacarpal. 
ig. 12. Hlotherium ingens. Right pes. ii, v, second and fifth metatarsals. 
(Figs. 3-12 are approximately + nat. size and are of bones belonging to the skeleton figured in Plate X VIT.) 
