TKRTIAKY VERTEBRATA OF THE FAYCM. 
lM8 
C. 10041. 1 nipoifcH-t, linmenis, very sliort and stout, but sliapo altered by adlierent matrix, 
lienotb EM cm. 
M. 9239. I’ roximal end of a largo humerus de.scribed above. Long diameter o£ bead .O'l cm., short 
diameter of lu^ad d'.5 cm. Presented hi/ Tl^. E. de Winton, PJsq., 1903. 
M. 9240. Distal end of a largo humerus, much abraded. Total width 7 cm., w idth of articular 
suid'aee 4’3 cm. Presented hi/ IF. ]J. de Winton, Eisq., 1903. 
Order CARNIVORA. 
The Carnivora are only represented in these deposits by members of the primitive 
group — the Creodonts, but traces of several genera of these, all referable to the family 
Tlyaenodontidse, have been hnind. One interesting point is, that certain of the 
limb-bones 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 Lufra, or still 
more with tliat of the probably more aquatic Potainotdierinm. The occurrence of such 
aquatic Creodonts is of considerable interest in view of the possible origin from them 
of the Pinnipedia. The conditions under which the Sirenia. originated from primitive 
semi-aquatic Ungulates, probably Proboscidean, would be precisely those under 
which semi-aquatic Carnivores miglit be expected to become modified in tlie direction 
of the Pinnipedia, a group which some waiters regard as having arisen directly from 
the Creodonta. 
Family IIY.ENODONTID.E. 
T1 lis family, as defined by Wortman*, is here represented by three genera — Pferodon, 
Apterodo)!, and Sinopa (or a very closely allied form), which are all known from other 
regions. The first lower molar is relatively small and weak, and the most specialized 
low'er carnassial tooth is the third molar. The isolated limb-bones that have been 
found can only be referred provisionally to any particular s])ecies. 
Genus HY.fflN0D0N, Laizer & Parieu. 
[Conipte.s Reiidus, vol. vii. (13.‘>8) p. 442 ; also Ann. dcs 8c'. Nat. [2] vol. xi. ]). 27.] 
'fiiird up])er molar wanting; first and second without antero-internal cusps; posterior 
lobe (metastyle) forming a cutting-blade larger than the anterior lobe, l^ow'er molars 
with neither jiostero-iuternal cus]) nor talon. 
* “ IStudii s of Eocene Mauuiialia iii (he Ahir.sli Collection, I’eabody Museuui," Ainer. .Jouni. ISci. [ I] 
vol xiii. (1902) p, 433. 
