r^ 





PLATE XLIX. 



Fig. 1. External view of the right mandible of Eryops willistoni. X %• 

 Drawing by S. Prentice, a — articular; c =: coronoid. 



Fig. 2. Maxillary tooth of Eryops willistoni. X %• 



Fig. 3. Fragment of cranium, including portion of right orbit and show- 

 ing very distinctly the suture bounding the anterior border of the right 

 frontal. A portion of the supraorbital lateral line canal may be also 

 detected. X %. = orbit. 



Fig. 4. Cross section of mandibular tooth, showing pulp cavity and dental 

 tubules. X 2. 



Fig. 5. External view of anterior portion of the right mandible. X %• 



