HOLLAND AND PETERSON: OSTEOLOGY OF THE CHALICOTHEROIDEA. 397 
The author states that the publication of the complete foot structure of Menis- 
cotheriwm or Hyracops by Marsh tends to confirm the supposition advanced by him 
in the American Naturalist, Vol. XXV, p. 911, that Menzscotherium and the Chal- 
icotheriodea are related, and reproduces the figures of the feet of Hyracops given by 
Marsh and of Chalicotherium (Macrotherium) given by Gervais. Dr. Osborn states 
that the resemblances between the two forms are ‘‘ fundamental” and that Menisco- 
thervum ‘ will probably be removed from the Condylarthra, where it has always held 
an anomalous position, and be placed in the Chalicotheriodea.”’ 
—— —— “The Ancestry of Chalicothervum.”’ Science, Vol. XIX, p. 276. 
1893. 
Dean, BaAsHrorp—“ Report of a Meeting of the Biological Section of the New York Academy 
of Sciences held Feb. 13, 1893.’ Anatomischer Anzeiger, VIII, April, 1893, p. 368. 
““H. F. Osborn described the foot of Artionyx, the new member of the order Ancy- 
lopoda Cope. It is distinguished from Chalicotherium by the character of ankle and 
pes, which present a marked resemblance to the Artiodactyla, while Chalicotheriwm 
represents these structures as found in Perissodactyla. Both genera are ungulate in 
ankle-joint, but the phalanges terminate in claws, and in view of the double parallelism 
between these two forms and the two sub-divisions of Ungulata, it was suggested to 
divide the Ancylopoda into the Artionychia and Perissonychia.”’ 
_Ossorn, H. F., anp WortmMAN, J. L.—‘‘ Artionyx, a New Genus of Ancylopoda.” Bulletin 
American Museum of Natural History, Vol. V, pp. 1-18. 
Artionyx is a synonym of Agriocherus (cf. W. B. Seott, 1894). 
Ossporn, H. F.— The Ancylopoda, Chalicothervum and Artionyx.” American Naturalist, 
Vol. XXVII, pp. 118-133. 
The author relates the story of the recent discoveries of Filhol and Depéret in 
France, gives a modified restoration of Chalicotherium, following Filhol and Depéret, 
but representing the feet somewhat more as they are in the Perissodactyla and not 
plantigrade as represented by the French naturalists. The apparent relationship 
between Meniscotherium and Chalicotherium is noted, and attention is called to the 
discovery of Artionyx gaudryi announced in the Bulletin of the American Museum of 
Natural History for February, 1898, and the subdivision of the Ancylopoda into the 
suborders Perissonychia and Artionychia is proposed. 
Osporn, H. F.—“ The Rise of the Mammalia in North America. Address by Henry Fair- 
field Osborn, Vice-President of the American Association for the Advancement of Science, 
Section of Zoology, Madison, Wisconsin, Aug. 17, 1893.” Studies from the Biological 
Laboratories of Columbia College, Zoédlogy, Vol. I, No. 2. 
On p. 43 the author accepts the ordinal name Ancylopoda proposed by Cope, and 
briefly reviews the knowledge of the subject at that time possessed. He throws out 
the suggestion that Agriocherus Leidy, the identity of which with the recently proposed 
