CASE— AMPHIBIA AND PISCES 



Treviatops iiiilleri. Xo. 640 Uni\-. of Chicago. X 



All figuies after Williston. 



1. Left hind leg, lower surface. 



2. Left tibia, outer surface. 



3. The same, upper articular suilace. 



4. Second rib, from the right side. 



5. Seventh rib, right side. 



6. Eighth rib, right side. 



7. Seventeenth rib, right side. 



8. Nineteenth rib, I'ight side. 



9. Twenty-third rib, right side. 



10. Twelfth and thirteenth hypocentra, 

 from below. 



11 



Xinth vertebra, from the side, nearly 

 natural size. 

 11a. The same, on same scale as the other 

 figures. 



Left sacral rib, from abo\-e. 

 Left half of the i)el\'is, outer surface. 

 A chex'ron bone, posterior surface. 

 The same, from the side. The last two 

 hgures nearly natural size. 



12. 

 13. 

 14. 

 15. 



