ADDENDA. 



317 



Anoplotherium cayluxense (page 198). 



M. 1842. Part of the left maxilla of a young individual ; from the 

 Upper Eocene of Bach, near Lalbenque (Lot), France. 

 This specimen shows mm. 3 and mm. 4 in a much- worn 

 condition. Purchased, 1884. 



M. 1775. Part of the right ramus of the mandible of a young indi- 

 vidual, showing mm. ft and mm. 4 ; from Bach. 



Purchased, 1884. 



Family CHCEROPOTAMID.E (page 247). 



Genus ELOTHERIUM (page 249). 



Elotherium magnum (page 249). 



M. 1727. The second left upper true molar; from the Upper Eocene 

 of Caylux (Tarn-et-Garonne), France. Purchased, 1884. 



M. 1439, 1440. Two canines (one imperfect) ; from the Upper 

 Eocene of Caylux. Purchased, 1884. 



M. 1454. The first left lower premolar ; from the Upper Eocene of 

 Caylux. Purchased, 1884. 



Elotherium mortoni, Leidy \ 



Syn. Archceotherium mortoni, Leidy 2 . 



This species is considerably smaller than E. magnum. 

 Hah. North America. 



29686. A left lower true molar ; from the Miocene of the White 

 Eiver, Dakota, U. S. A. Purchased, 1855. 



Genus CEBOCHCERUS, Gervais 3 . 

 The writer provisionally follows Flower in referring this genus to 

 the present family. It is referred by Filhol in the Ann. Sci. Geol. 

 vol. viii. art. 1, p. 107, to the group " Pachysimiens," and is con- 

 sidered to present characters connecting Choerojpotamus with the 

 lemuroid Primates. The third lower molar has a well-developed 

 talon. 



1 Proc. Ac. Nat. Sci. Philad. for 1857, p. 89 (1858), Archceotherium. 



2 Loc. cit. 



3 Zool. et Pal. Franchises, 1st ed. vol. ii. Exp. no. 35 (1S48-52). 



