CASE— COTYLOSAURIA 



1. Top view ofskuW of specimen of S. bayloretisis. X%. From Broili. «, nasal; /, lachrymal; ///, prefrontal; 



o, orbit; tn, maxillary; ptf, postfrontal;/c>, postorbital;/, jugal;/, frontal;y/, intertemporal; sg, prosquamos- 



al; st, squamosal; e, epiotic;/, parietal; so, supraoccipital plates. 

 1. Clavicles and interclavicle of Seymouria. X %. From Broili. cl, clavicle; est, interclavicle. 



3. Posterior view of skull of .Siryw/oaWa. X %. From Broili. ^, tabulare; io, supraoccipital plates; fjr, exoccipit- 



al; _/>«, foramen magnum;//, pterygoid; c, condyle; />, paroccipital; m, mandible. 



4. Skull and anterior vertebrae of .Si»>'>«o«r/a. X %. From Broili. Letters as in fig. 1. 



5. Lower surface of skull of ^yw/owr/a. X. %. From Broili. /i, parasphenoid; d/i, basisphenoid; At>, basioc- 



cipital; c, condyle; pt, pterygoid; p, paroccipital; d, remains of small teeth. 



