212 
CORYPHODON. 
The anterior descending crest is well developed. The enamel of the pre¬ 
molars of both jaws is smooth, and the same is true of the end of the crown 
of the canine, which is triangular and without grooves. 
Measurements. 
M. 
Length of the last superior molar. ...i. 0. 031 
Width of the same.... 0. 039 
Width of the last inferior molar... 0.026 
Width of the penultimate inferior molar. . 0.026 
Length of the same... 0. 038 
Elevation of the inner posterior cusp. 0.016 
Elevation of the inner anterior cusp... 0.025 
Length of the inferior premolar.. 0. 022 
Width of the same. . 0. Old 
Width of the crown of an incisor. .. 0. 019 
The second specimen includes the last inferior molar, the penultimate 
molar, some premolars, and the superior canine without its apex; also a 
portion of the zygomatic arch. The teeth present typical characters, 
including the smoothness of the enamel. The posterior heel is rather 
better developed than in the first-mentioned specimen, resembling in this 
respect the typical specimen from Wyoming. It is a narrow ledge, which 
rises very steeply to the outer base of the inner tubercle, and then, in the 
last molar, sends off a short rugose continuation inward, which does not 
extend beyond the posterior face. The posterior outer angle of the Y of 
the inferior premolars is quite protuberant. The base of the crown of the 
superior canine is a spherical triangle in section. The teeth indicate a large 
animal. 
Measurements. 
Length of the last inferior molar. 
Width of the same. 
Elevation of the inner anterior cusp of the same. 
Elevation of the inner posterior cusp of the same. 
Elevation of an inferior premolar. 
Length of the same. . 
Width of the same ... 
Diameter of the base of the crown of the superior canine < f 
‘ ( lesser .. 
M. 
0. 039 
0. 027 
0. 024 
0. 016 
0. 021 
0. 023 
0. 018 
0. 030 
0. 025 
The zygomatic process of the malar bone is rather flat and not stout; 
