22 



Explanation of Figures. 



Figure 1. — Skull of Eryops megacephalus from above, one fifth natural 



size. 

 Fig. 2. — The same skull, profile. 

 Fig. 3. — The same from below. 



Fig. 4. — Mandibular ramus from ahove, one-fourth natural size. 

 Fig. 5. — A large part of the vertebral column of a second specimen from 



the left side, one-fourth natural size. 

 Fig. 5: — The same from below. 



Fig. 7. — Anterior view of atlas and axis, natural size. 

 Fig. 8. — Posterior view of a dorsal vertebra, natural size. 

 Fig. 9. — Inferior part of scapula with coracoid, of same animal, external 



side. 

 Fig. 10. — Same, interno-posterior view. 

 Fig. 11. — Pelvis of the same individual, left side. 

 Fig. 12. — Same, from front. 

 Fig. 13. — Same, from behind. 

 Fig. 14. — Same, from below. 

 Fig. 15. — Femur of same individual, from above. 

 Fig. 16. — Same, from below and behind. 

 Fig. 17. — Proximal end. 

 Fig. 19.— Distal end. 

 Fig. 9. — Inferior view of skull of Empedoeles molaris, one-half natural 



size. 

 Fig. 10. — Posterior view of the same skull, half natural size. 

 Fig. 11. — 14 bones of Dimetrodon incisivus, one-fourth natural size, from a 



single individual. 

 Fig. 11. — End of muzzle, left side. 



Fig. 12. — Lateral view of a large part of the vertebral column. 

 Fig. 13. — Thirteenth vertebra, lacking the summit of the neural spine, from 



behind. 

 Fig. 14. — Fourteenth vertebra, lacking apex of neural spine, from front. 

 Fig. 15. — Nineteenth vertebra of same skeleton, lacking most of neural 



spine, from behind, two-thirds natural size. 

 Fig. 16. — Sacrum of same from front, two-thirds natural size. 



The above figures will appear in the Proceedings of the American 

 Philosophical Society. 



Published, June 5, 1880. 



