CASE— COTYLOSAURIA 



PLATE 12 



1. hower view of skuW of Aabidosaurus haviatus , from Williston. XI. Restored from No. 



641 Univ. of Chicago, s, splenial; pa, palatine; an, angular; fit, pterygoid; bs, basisphe- 

 noid; a, articular; st, stapes; efi, quadratojugal; e^:, exoccipital;/>/, paroccipital. 



2. Posterior surface of same, fifi, paroccipital; efi, quadratojugal; g, quadrate. 



3. Occipital region of same, fit, pterygoid; efil, epipterygoid. 



4. Lateral view of same. X 1. 



