ox SOME NEW AND LITTLE KNOWN CEEODONTS. 
185 
EXPLANATION OF THE PLATES : 
Plate V. 
Mesonyx obtusiJens . — Cope. Restoration of skeleton about i natural size ; mostly from one indi- 
vidual found at Twin Buttes, Wyoming, and now in the Princeton Museum. 
Plate VI. 
Fig. 1. Mesonyx obtusidens ; side view of skull, two-fifths natural size. 
\a. Base of same skull. 
Fig. 2. Hyanodon cruentus . — Leidy. Side of skull two-fifths natural size. 
2«. Base of same skull. 
Plate VII. 
Fig. 1. Mesonyx obtusidens; left manus. 
Fig. 2. Mesonyx obtusidens ; left pes. In this figure the artist has omitted to indicate that the 
length of the metatarsals, except No. V, is conjectural. Proximal and distal ends and 
most of the shafts are present in the specimen for all the metatarsals, but only No. V is 
complete. 
Fig. 3. Mesonyx obtusidens ; phalanges of 3rd digit of manus. 
Fig. 4. ^ Hyanodon horndus—lx-mx . Natural cranial cast. 
Fig. 6 . Hyanodon horridus ; right manus from a specimen belonging to the Museum of Compara- 
tive Zoology, at Cambridge, Mass. 
Fig. 6. Hyanodon horridus ; phalanges of pollex of same sj)ecimen. 
(Figures of Plate VII all natural size). 
