EXPLANATION OF PLATE XXXVII. 



Figs. 1-3. Auchenia hesterna: 



Specimens from the Quaternary of California, and belonging to the cabinet of Wabash 



College, Crawfordsville, Indiana. 

 Fig. 1. Outer view of the series of lower molar teeth of the left side, one-half the natural 



size. 

 Fig. 2. Triturating surfaces of the same series, natural size. 

 Fig. 3. A second upper molar of the left side, view of the triturating surface, natural size. 



Fig. 4. Bison: 



Last lower molar of the left side, triturating surface, natural size. Specimen found with 

 remains of Megalonyx Jeffersoni, in Illinois. 



Fig. 5. Acbodus humilis. Magnified one and a half times. View of the triturating surface of a tooth. 

 From the Cretaceous of New Jersey. 



Figs. 6-12. Edaphodost mirificus. One-half the natural size. Specimens from the Cretaceous of New 

 Jersey, and belonging to the cabinet of Rutgers College, New Brunswick, New Jersey. 

 Fig. 6. The mandibles seen on their oral surface. 

 Fig. 7. Outer view of the left mandible. 

 Fig. 8. Inner view of the left mandible. 



Fig. 9. Posterior outline of the same, with outlines of the dental columns. 

 Fig. 10. The maxillae seen on their palatine or oral surface. 

 Fig. 11. Outer view of the left maxilla. 

 Fig. 12. Posterior outline of the same, with outlines of the dental columns. 



Figs. 13, 14. Eumylodus laqueatus : 



Left lower maxilla, oue-half the natural size. 

 Fig. 13. Oral surface, exhibiting the dental tubercle. 



Fig. 14. Outer view. Specimen from the Cretaceous of Mississippi, and discovered by Dr. 

 William Spillman. 



Fig. 15. Pontobasileus tubercul.vtus. Fragment of a tooth, with restored outline, natural size. 



Figs. 16, 17. Manatus inokxatus. A lower right molar, natural size. From the phosphate beds of 

 Ashley River, South Carolina. 

 Fig. 16. Upper view. 

 Fig. 17. Outer view. 



Figs. 18, 19. Pycnodus robustus. Tooth of the natural size. 

 Fig. 18. Triturating surface. 

 Fig. 19. Posterior view. Specimen from the Cretac'eous of New Jersey. 



