EXTINCT CATS. 285 
IV. GENUS EUSMILUS. 
Fusmilus, Gervais, Zool. et Pal. Gén. ser. 2, p. 53 (1876) ; 
Lydekker, Cat. Foss. Mamm, Brit. Mus. pt. v. p. 310 
(1887). 
This genus agrees with the preceding in the general structure 
of the lower jaw and the large size of the upper canine teeth ; 
but differs in the excessive depth of the descending flange-like 
expansion at the front of the lower jaw, and also in having 
only two pairs of lower incisor teeth. It is further characterised 
by the small size of the front lobe of the blade of the upper 
carnassial tooth, as well as in the presence of a small posterior 
keel to the corresponding lower tooth, the latter feature affiliat- 
ing it to the more generalised members of the Family. The 
genus is known only by £. dzdentatus from the Upper Eocene 
(Oligocene) Phosphorites of Central France. 
Ve. GENUS ALURICTIS., 
At lurogale, Filhol, Ann. Sci. Géol. vol. ili. art. 7, p. 14 (1872) 
nec Fitzinger. 
Ailurictis, Trouessart, Bull. Soc. Angers. vol. xv. Cat. Mamm. 
p. 92 (1885). 
With this genus we come to the first of several genera of 
Cat-like Mammals agreeing with A/acherodus in the possession 
of elongated and compressed upper canine teeth protected by 
a flange-like expansion of the lower jaw, and likewise by the 
angulated front surface of the latter; but differing in several 
important structural features indicative of more generalised 
affinities. In the first place, the upper carnassial tooth has 
only two (instead of three) lobes to its cutting blade, while the 
corresponding lower tooth has always a well-developed posterior 
heel. Further, the upper molar is placed more or less poste- 
riorly to the carnassial, instead of on its inner side, and a 
small second lower molar is generally retained behind the 
lower carnassial tooth. ‘There are likewise usually three, in- 
stead of two, lower pre-molar teeth. Differences also obtain in 
