CASE— AMPHIBIA AND PISCES 



Treiiiatops Diilleri. No. 640 Univ. of Chicago 



1. Left hind leg, lower surface. 11. 



2. Left tibia, outer surface. 



3. The same, upper articular surface. 11a. 



4. Second rib, from the right side. 



5. Seventh rib, right side. 12. 



6. Eighth rib, right side. 13. 



7. Seventeenth rib, right side. 14. 



8. Nineteenth rib, right side. 15. 

 Twenty-third rib, right side. 

 Twelfth and thirteenth hypocentra, 

 from below. 



9. 

 10. 



. X %• All figures after Williston. 

 Ninth vertebra, from the side, nearly 

 natural size. 



The same, on same scale as the other 

 figures. 



Left sacral rib, from above. 

 Left half of the pelvis, outer surface. 

 A chevron bone, posterior surface. 

 The same, from the side. The last two 

 figures nearly natural size. 



