24 CARNIVORA. 
This species has been identified by Filhol, in the Ann. Soe. Sci. 
Phys. Nat. Toulouse, 1882, p. 12, with Hyenodon requient. The 
name H. brachyrhynchus apparently has the priority’. This species 
is of considerably smaller size than the last, and is readily distin- 
guished by the crown of the second lower premolar being extremely 
tall and narrow. ‘The last upper premolar has no distinct anterior 
talon, and the crown of the second upper premolar is very tall and 
narrow ; the first premolar is small. 
Hab. France. 
M.1668. Anterior portion of the cranium and mandible of an 
immature individual; from the Upper Eocene of Bach, 
near Lalbenque (Lot), France. This specimen is very 
important and valuable, as it shows the cranium and 
mandible in association, which is a comparatively rare 
condition. It exhibits the upper incisors, the upper and 
lower canines, most of the upper premolars, m. 3, and the 
second and third lower premolars—the latter not fully 
protruded. In the long and narrow pm. 2, and the absence 
of a distinct anterior talon to pm. 4, this specimen agrees 
with ‘the cranium figured by Filhol in the Ann. Soe. Sci. 
Phys. Nat. Toulouse, 1882, pl. i. It also agrees precisely 
in every detail of shape and size with a more perfect 
cranium figured by the same writer in a memoir not yet 
published. The specimen shows that pm. 2 was a tall 
narrow tooth, very different from that of A. heberti 
(No. 26749). The interval between the canine and 
m. 1 is 0,041, as compared with 0,051 in H. heberta 
(No. 28203). Purchased, 1884. 
M.1351. Fragment of the middle portion cf the cranium, com- 
prising part of the palate, the frontals, and nasals, and 
showing the last three premolars and the two true molars ; 
from the Upper Eocene of Caylux, France. This spe- 
cimen belonged to an immature individual; but, except in 
being slightly smaller, it agrees precisely with the cranium 
figured by Filhol in the Ann. Soc. Sci. Phys. Nat. Toulouse, 
1882, pl. i. There is no anterior talon to pm. 4, 
Purchased, 1884. 
M. 1363. Fragment of the right maxilla, containing the last two 
molars; from the Upper Eocene of Caylux. This spe- 
1 In the notice by Filhol, already cited, the impression is given that the 
specific name brachyrhynchus was applied in the original notice by Dujardin 
(Comptes Rendus, vol. x. p. 154 [1840]); but this is not really the case. 
