THE MAMMALIA OF THE UINTA FORMATION. 571 



EXPLANATION OF PLATES. 

 Plate VII. 



Protoreodox PARVrS. 



Fig. 1. Skull, side view ; la, base of skull and superior molars ; 16, brain from above ; »», sylvian g) rus : \, 

 lateral : hi, median gj'rus. 



2. Inferior molars, internal view ; 2<i, crown view. 



3. Porlion of c a r p u s with first digit. 



4. Humerus, anterior view of distal end. 



5. Tibia and fibula, anterior view ; 5a, distal view. 



6. Pes, anterior view, of a larger individual. 



7. Phalanges, of fourth digit. 



8. -Metatarsal 1 1 , medial side of proximal end ; c^, facet for mesocuneiform ; <•,, for entocuneifonn. 



Leptotraoulvs proa^tjs. 



9. Lower jaw, side view, combined from specimens shown in Figs. 10 and 1 1. 



10. Lower jaw, inner view, showing pm. 4 and m. 1 ; a, crown view. 



11. Second and third lower molars of another specimen, inner view ; a, crown view. 

 13. Ulna and radius, pro.ximal end. 



13. Scapula, distal end ; 13a, glenoid cavity. 



14. Metacarpal iv, anterior view ; 14a, proximal end ; u, facet for unciform. 



15. Portion of tarsus, anterior view. 



10. Cuboid. 



(Figures natural size.) 



Plate VIII. 

 Dii'LACODON, see page 514. 



FxQ.\-\a. Fifth cervical vertebra, anterior view, lateral view. 

 2. Dorsal vertebra, between d. 7 and rf. 10. 

 3-4. Lumbar vertebra, laleml view, posterior view. 



5. Femur, anterior view ; 5a, external view ; 56, distal view. 



6. Tibia, anterior view ; Ga, distal view. 



7. Left OS innominalum, lateral view, x i- 



8. Calcaneum and astragalus, front; 8a, external ; 86, posterior view of astragalus; c. distal view. 



9. Carpal 9, proximal row ; probably belonging to a young individual ; u, proximal surliices. Reference to 



Diplacodon uncertain. 



Plate IX. 



Drri.AronoN. see pagi-s 515-10. 



Pig. 10. 11 na and radius, external view ; 10a, distal view ; 106, anterior view : lOc, internal view. 



11. Humerus, posterior view ; 11a, external view. 



12. Left scapula, outer surface, X J ; a, glenoid fos^a. 



13. Right man us, x 1; the cari'als are restored Inuii Paltrntynpt and Titannl/ieriiim ; the nu-liirarpiil!< 



arc slightly foreshortened ; b, mcs. ii-iv, proximal view ; a, mc. iv, distal view, x ', 



14. Superior molar, probably to'. 



15. Axis, belonging to a smaller indiviilual ; .tide view. 



