PLATE LXII. 



Figures oi iiortious of skeletons of insectivorous MammaVui froni the White River beds of Colorado; 



natural size, or twice natural size. 

 Figs 1-9. — Fcrathfrium J'ufiax Cojie. Pa.ge 794. 



Fig. 1. — Anterior portion of skull, natural size, left side ; a, sujierior side. 

 Fig. 2. — The same .skull, twice natural size, the right side; a, from below. 

 Fig. 3. — Kight ramus of the maudible, lacking both extremities, natural size, the iiuier side. 

 Fig. 4. — The same ramus, twice natural size, the outer side ; a, the inner side ; b, from above, showing 



coronal .surfaces of teeth. 

 Fig 5. — Right ramus of the mandible of another individual with extremities wanting, natural size. 

 Fig. G. — The same ramus, twice natural size, external side ; a, inner side; 6, from above. 

 Fig. 7. — Right ramus inaudibuli of another individual, twice natural size, external side ; a, inner side. 

 Fig. 8. — Portion of right mandibular ramus of another individual, twice natural size, external side ; a, 



exhibiting canine in jdace ; h, from above. 

 Fig. 9. — Superior view of a portion of another right ramus, with some of the anterior teeth missing 



twice natural size. 

 Figs. 10, 11. — Ferntkerhim tricusjtis Cope. ' Page 796. 

 Fig. 10. — Posterior portion of left ranjns of the mandible, natural size. 

 Fig. 11. — The same, twice natural size; a, the inner side ; h, from above. 

 Figs. 12-16. — Peratheriiim htintii Cope. Page 796. 

 Fig. 12. — Portion of left ramus, natural size. 



Fig. 13. — The same fragment, twice natural size, external side ; a. inner side ; 6, from above. 

 Fig. 14. — Portion of right ramus of another individual, twice natural size ; a, inner side ; b, from above. 

 Fig. 15. — Anterior portion of right ramus of a 1 bird individual, external side, natural size ; a, the same, 



twice natural size, inner side. 

 Fig. Ki.^Auterior portion of the right ramus of a fourth iudividiuil, the inner side; o, the superior 



aspect. 

 Fig 17. — Posterior portion of left mandibular ramus of rcralheriiim scniare Cope, natural size, external 



side. Page 798. 

 Fig. 18. — The same fragment, twice natural size, external side ; a, internal aspect ; b, from aljove. 

 Figs. 19-21. — Peratheriiim inarginale Cope. 



Fig. 19. — Posterior part of right mandibular ramus, ratural size, outer side. 

 Fig. 20. — The same, twice natural size ; a, inner side ; b, superior view. 

 Fig. 21. — Median portion of rannis of a second individual, external view; a, internal view. 

 Figs. 22-24. — Peralherium alternans Cope. Page 799. 

 Fig. 22. — Portion of left mandible from the inner side, natural size. 



Fig. 23. — The same, from the inner side, twice natural size ; a, exteinal side ; b, from above. 

 Fig. 24. — Middle portion of ramus of another individual, left side, external view, twice natural size. 

 Fig. 25. — Posterior portion of riglit mandible of Uomnhia yrnilata Cope, natural size, seen from the outfcr 



side. Page 810. 

 Fig. 26. — The same ramus, external view, twice natural size; u, the inner side; b, molar, coronal sur- 

 face. 

 Fig. 27. — Eight mandibular ramus, posterior portion, of Ihmnina crassiyenis, seen from outer side. 



Page 811. 

 Fig. 28. — The same fragment, twice natuial size, outer side ; a, inner side; b, from above. 

 Fig. 29. — Corresponding ramus of the left side, seen from above. 



