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. 18.—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. A 
Fig. 9.—Inferior view of skull of Hmpedocles 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. 
