502 PROCEEDINGS OF THE NATIONAL UU8EVM. vol. 38. 



Plate 27. 



Lower jaw of Leidyosuchus sternbergii. Cat. No. 6533, Q.S.N.M. One-half natural 

 size. Superior view. 



ang., angular; art., articular; d,, dentary; /., postsymphysial foramen; i. m.f., inter- 

 nal mandibular foramen; .v., splenial; s. ang., Burangular. 



Plate 28. 



Skull of Leidyosuchus sternbergii. Cat. No. 5898, Amer. Mus. of Nat.History. One- 

 half natural size. Seen from above. 



Plate 29. 



Skull of L( idifosuchus shrnbrn/ii. < 'at . No. 5898, Amer. Mus. of Xal . History. ( )ne- 

 half natural size. Seen from below. 



u. p. v., anterior palatine vacuity; mx., maxillary; r/., quadrate; p., palatine; 

 pmx., premaxillary; p. >t., posterior Dares; /;/., pterygoid. 



