Cope.] ^O [May 7, 



Measurements. M. 



Width of skull at cantlius oris 145 



Length of inferior canine tooth , . .006 



"Width between bases of pectorals 093 



Length of basal axis of pectoral 060 



" "ventral 035 



"Width between bases of ventrals 033 



Diameters of exposed parts of an abdom- ( fore and aft. . .012 

 inal scale (longitudinal.. .015 



The Megalichiliys Mhberti Ag., which this species resembles in some de- 

 gree, is represented by authors as having the scales minutely granulated 

 on the surface. The ganoine layer also covers the superior surface of the 

 skull, a peculiarity which is not present in the Ectosteorhadiis nitidus. 



Explanation of Figures. 



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



size. 

 Fig. 3. — The same skull, profile. ' 



Fig. 3. — The same from below. 



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

 Fig. 5. — A large part of the vertebral column of a second specimen fr(>m 



the left side, one-fourth natural size. 

 Fig. 6. — 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. 13. — 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. 30. — Inferior view of skull of Empedodes molaris, one-half natural 



size. 

 Fig. 21. — Posterior view of the same skull, half natural size. 

 Fig. 33-35. — Bones of Dimetrodon incisivus, one-fourth natural size, from 



a single individual. 

 Fig. 33.— End of muzzle, leftside. 



Fig. 33. — Lateral view of a large part of the vertebral column. 

 Fig. 34. — Thirteenth vertebra, lacking the summit of the neural spine, from 



behind. 

 Fig. 35. — Fourteenth vertebra, lacking apex of neural spine, from front. 

 Fig. 26. —Nineteenth vertebra of same skeleton, lacking most of neural 



spine, from beliind, two-thirds natural size. 

 Fig. 37.— Sacrum of same from front, two-thirds natural size. 



