HOLLAND AND PETERSON: OSTEOLOGY OF THE CHALICOTHEROIDEA. 391 
1881. 
Copzr, E. D.—‘‘ The Systematic Arrangement of the Order Perissodactyla.”” Proceedings of 
the American Philosophical Society, Vol. XIX, pp. 377-403. 
On p. 395 the Chalicotheriide are given a place between the Tapiride and the 
Menodontide, and the following genera are indicated as belonging to the group: 
Europe—Rhagatherium, Propaleotherium, Chalicotherium. 
N. America—Leurocephalus, Palewosyops, Limnohyus, Lambdothervum, Menisco- 
thervum. 
Asia—Nestoritherium. 
———— “The Classification of the Perissodactyla.”’ American Naturalist, Vol. XV, 
p. 340. : 
Practically the same paper as the foregoing. 
1882. 
Corr, EK. D.—“ Synopsis of the Vertebrata of the Puerco Eocene Epoch.” Proceedings of the 
American Philosophical Society, Vol. XX, pp. 461-471. 
On p. 470 the author describes Meniscotherium tapiacitis sp. nov. 
———— American Naturalist, Vol. XVI, p.522. The genus Ectocion is established for the 
reception of Oligotomus osbornianus. “If it is not condylarthrous, it must be placed 
in the Chalicotheriide as the most primitive form.” (Note. Since recognized as 
belonging to the Phenacodontide.—W. J. H.) 
1883. 
‘Corr, E. D.—Proceedings of the American Philosophical Society, Vol. XX, p. 443. Manus 
of Hyracotherium venticolum figured. (Note. Now referred to the Hquide.—wW. J. H.) 
ScHLosseR, Max—Jahrbuch der Mineralogie, 1883, ii, p. 164. 
The genus Hyracotherium is discussed. 
1884. 
Marsu, O. C.— Dinocerata, a Monograph of an Extinct Order of Gigantic Mammals.” 
On p. 172 Professor Marsh suggests the descent of Chalicotheriwm from Diplacodon 
' through Brontotheriwm. 
Perné, J.—“ Ueber die Fossilen Sdugethier-tiberreste von Baltavdér.”’ Jahrbuch d. K. 
Ungar. Geol. Anstalt, 1884, pp. 455-464. 
Describes Chalicotherium baltavar ense. 
1885. 
.Copgr, E. D.—‘‘ The Vertebrata of the Tertiary Formations of the West. Book I.’ Report 
of the U. S. Geological Survey of the Territories by F. V. Hayden, Geologist in charge. 
Vol. III, Washington, pp. xxxv+1009, Pls. I-LXXVa. 
