348 O. C. Marsh—American Jurassic Mammals. 
PLATE IX. 
FIGURE 1.—Left lower jaw of Stylacodon gracilis, Marsh; outer view. 
Figure 2.—Left lower jaw of Dryolestes priscus, Marsh; inner.view. 
FiGguRE 3.—Left lower jaw of Dryolestes vorax, Marsh; outer view. 
FIGURE 4.—The same jaw; inner view. 
Figure 5.—Left lower jaw of Laodon venustus, Marsh; inner view. 
FIGURE 6.—Left lower jaw of Asthenodon segnis, Marsh; anterior part, outer view. 
FIGURE 7.—Right lower jaw of same species; outer view. i 
a, canine; 06, condyle: c¢, coronoid process; d, angle; g, mylohyoid grove ; 
s, Symphyseal surface. 
All the figures are three times natural size, except figure 5, which is four times 
natural size. 
PLATE X. 
FIGURE 1.—Right lower jaw of Tinodon bellus, Marsh; inner view. 
FIGURE 2.—Right lower jaw of Docodon striatus, Marsh; inner view. 
FigurE 3.—Right lower jaw of Diplocynodon victor, Marsh; outer view. 
FIGURE 4.—Right lower jaw of Hnneodon crassus, Marsh; outer view. 
Figure 5.—Left lower jaw of Menacodon rarus, Marsh; outer view. 
Figure 6.—The same jaw; inner view. 
Figure 7.—Left lower jaw of Pawrodon valens, Marsh; outer view. 
FIGURE 8.—The same jaw; inner view. 
FIGURE 9.—Right lower jaw of Priacodon ferox, Marsh; inner view. 
a, canine; b, condyle; c, coronoid process; d, angle; /, dental foramen; g, 
mylohyoid groove; s, symphyseal surface. 
Figures 2 and 3 are twice natural size, and the others, three times natural size. 
