PLATP] LXXV. 
Tcelh and Jaw fragments of Horses, natural size. 
Fig. 1. Inferior view of tbe superior molar teeth and palate of the typicjil speeiiiieii of Ilippotlurimn eala- 
marium; a, external view of maxillary hone, containing three anterior molars of leftside. 
Page 321. 
Fig. 2. Portion of the lower jaw of the individual of Hippolherium calamarium, figured in the preceding 
plate, containing the molar series, viewed from the outer side; a, the same, seen from above. 
Fig. 3. Left superior molars of Hippotherium speciosum, seen from below ; a, external side. The series is 
interrupted by a fragment of matrix hetween the fourth and fifth molars. Page 322. 
Fig. 4. Fragment of the mandibular ramus of a Horse, with three molar teeth, from above. 
Fig. 5. The first three inferior molars of a larger Horse, much worn, from above. 
Fig. 6. The incisor series of the individual represented in Fig. .5. 
Fig. 7. Worn superior molar tooth of a species of Protoldppus, from below; a, the external face. Page 323. 
