TEllTTAEY VEETEBEATA OF THE FAYtM. 
•J18 
C. 10041. Iiii|K'rfoct rio'lit liuiiienis, very slioit and stout, but shape altered by adlioreut matrix. 
L('Uotli ]i'yi cm. 
M. 9239. I’roximal end of a large humerus described above. Long diameter of bead 5'1 cm., short 
diameb'r of bead 4‘5 cm. Presented hy W. E. de Winton, Esq., 1903. 
M. 9240. J)isla,l end of a large humerus, much abraded. Total width 7 cm., width of articular 
surface 4’3 cm. Presented hy W. Id. de TFi/i^ou, Idsq., 1903. 
Order CARNIVORA. 
The Carnivora are only represented in these deposits by members of the primitive 
group — the Creodonts, bnt traces of several genera of these, all referable to the family 
Hyoenodontidge, have been found. One interesting point is, that certain of the 
limb-hones indicate that some of these animals lived an aquatic or semi-aquatic life. 
One humerus (C. 9445) is practically identical in form with that of Lutra, or still 
more with that of the probably more aquatic Potamotherium. The occurrence of such 
aquatic Creodonts is of considerable interest in view of the possible origin from them 
of the Pinnipedia. The conditions under wdrich the Sirenia originated from primitive 
semi-aqiiatic Ungulates, probably Proboscidean, would be precisely those under 
which semi-aquatic Carnivores might be expected to become modified in the direction 
of the Pinnipedia, a group which some writers regard as having arisen directly from 
the Creodonta. 
Family IIY.FNODONTIU.R. 
This family, as defined by Wortman*, is here represented by three genera — Pterodon, 
Apferodoi), and Sinopa (or a very closely allied form), which are all knorvn from other 
regions. The first lower molar is relatively small and weak, and the most specialized 
lower carnassial tooth is the third molar. The isolated limb-bones that have been 
found can only be referred provisionally to any particular species. 
Genus HY.fflN0D0N, Laizer & Parieu. 
[Coiuptes Leudus, vol. vii. (1838) p. 442 ; also Auu. ik\s Sc. Nat. [2] vol. xi. p. 27.] 
Tiiird upper molar wanting; first and second without anb'ro-internal cus])s ; posterior 
lobe (met.'istyle) forming a cutting-blade larger than the anterior lobe. Lower molars 
with neither postero-internal cus]) nor talon. 
* “ Studies of Eocene Mammalia iii the iMarsli Collection, Eeabody Museum," Amer. .lourn. Sci. [4] 
vol. xiii. (1902) p. 433. 
