Temnocyon and Hypotemnodon. — Eyerman. 281 
■declivity is sharper in these two species. In fact in all points 
both these two species agree very closely. The antero-poste- 
rior diameters are respectively 15 mm. and 20 mm., and the 
transverse are proportionate. 
The contour of the crown of m^i is essentially the same in 
both species with the following exceptions : the external edge 
of the crowm is not compressed as in Temnocyon. neither is 
there a compression at the anterior and posterior of the tooth 
in both these species as in T.ferox; the antero-posterior dia¬ 
meters are, T. altigenis 14 mm, Daphcenus 10 mm; the develop¬ 
ment of the para- and metacones is proportionate to this 
scale; the protocone, however, is perhaps equalty as well de¬ 
veloped in both, in the type being somewhat more pyramidal; 
in Temnocyon this cone is placed anterior to a line drawn 
through the groove between the external cones, but in Daphce¬ 
nus is directly opposite this groove; nor is the valley or 
groove separating this cone from the external ones so broad 
ns in Temnocyon. 
The contour of the crown of m .2 is almost identical with 
* 
that of T. altigenis and its position with reference to m jl is 
similar, but in this respect it differs, as does the type species, 
from the position in T. ferox , where, as noticed above, the 
tooth is set back from the external edge line of the preceding- 
crowns and placed midway between the external and internal 
edges of m. i. M.2 does not decrease with proportionate regu¬ 
larity, for in mj. the antero-posterior diameter in Daphcenus 
is about four-fifths that in T. altigenis, whereas in this 
diameter, in the former species, is about one-half that in the 
latter. The external cones are pyramidal, the metacone is 
nearly equal in size in both; the paracone is proportionately 
less in height in Daphcenus. The protocone in both is rather 
an obtuse pyramid. The cingulum appears stronger in 
Daphcenus. 
M.3 is present in Daphcenus , occupying the same position to 
m .2 as in T.ferox im2 does to m. l , i. e., it is placed back from 
the external crown line of the dentition and midway between 
the external and internal edges of m. l. Its crown is nearly 
flat and does not show tuberculation very distinctly; the an¬ 
tero-posterior diameter is 3 mm. and the transverse 6 mm. 
