178 
TEirJ'lAEY VEUTBBEATA OF THE EAY&M. 
Suborder ARTIOBACTY LA. 
Family ANTHRACOTIIEFIIIFF:. 
Genus ANCODON, Pomel. 
[Arcliiv. Sci. Pliys. et Nat., Geiiive, [4] vol. v. p. 207 (Juno 1847) (as a subgenus 
of Palaotliervum.)~\ 
1848*. Bothrioclon, Ayniard, Ann. Soc. Agile. Sci., Arts, et Comm, du Puy, vol. xii. pp. 239, 
246-247, footnote (as a subgenus of Aiitliracotlieriuin'). 
1848. I]yo-potamus'\, Owen, Quart. Journ. Geol. Soc. vol. iv. ]). 103. 
1848. Ancodusi, Pomel, op. cit. supra, [4] vol. viii. pp. 324-.5 (raised to generic I’ank, and 
unnecessarily emended from Ancodon'). 
At least two species referable to this genus occur in the Upper Eocene beds of the 
Fayum, and from the comparative abundance of their remains these animals seem to 
have been very common in the later Eocene period. As might be expected from their 
somewhat earlier date, the sjiecies here described are rather more primitive in their 
tooth-structure than are the forms from the Oligocene of Europe and America. Tliis 
is especially noticeable in the more brachyodont and less selenodont character of the 
molars, which resemble to some extent those of Anthracotherium, but are still more 
like those of the much later (L. Miocene) genus Braehyodas, remains of which, it 
is interesting to note, have been found at Moghara, to the north-west of the Fayum. 
It may eventually be necessary to separate the present species from Ancodon, but on 
account of the great general resemblance of the lower jaw of yi. to that of 
some of the European forms such as A. velaiinus, it seems desirable, until a more 
distinctive character than the slight differences in the teeth above referred to has 
been found, to retain the same generic name for both. 
The skeleton in this genus has been described in detail by Kowalevsky [j;, Filhol §, 
Scott II , and others, so that here it will only be necessary to give a short account of 
the various specimens in the collection under their several numbers in the list below. 
* There i.s some doubt about tins date, since while the titlepage of the volume is dated 1846, the cover 
has 1848. lu spite of the fact that it has been authoritatively slated (see Bush, Amer. .lourn. Sci. [4J 
vol. xvi. (1903) pp. 97-98) that this volume was printed in 1847, it seems jn-obable that the date on the 
cover represeuts the date of issue (i. e. of publicatiou), particularly as the author’s sepai'ate copies are 
known to have been dated 1848 also. This being the case, it seems desirable to ado 2 )t Boniersname Ancodon 
of 1847 for the genus. 
t J’reoccupied in 1844 by Kaup for a genus of lIippo()otamidic. 
X “On tlie Osteology of the llyopotamidye,” Idiil. Trans. 1873, p. 19. 
§ “ Etudes des Mammi‘eres fossiles de llonzon,” Annales des 8ciencos Oeologitpies, vol. xii. (1882). 
II “ 8tructuro ami lielationshij)s of ylncodus,” Journ. Acad. Nat. 8ci. Phihulelpliia, [2] vol. ix. (1884-95) 
p. 461. 
