22 BAUR. 



EXPLANATION OF PLATES I and II. 



(Figures two-thirds natural size.) 



Fig. I. Probably the superciliare. 



Fig. 2. Left jugal from side : vi. connection with maxillary. 



po. connection with postorbital. 

 Fig. 3. Left quadratojugal : ip. face for quadrate. 



p. face for paroccipital. 

 po. 0. face for postorbital. 

 Fig. 4. Left prefrontal : pal. face for palatine. 

 f. face for frontal. 

 m. face for maxillary. 

 Fig. 5. Left postfronto-orbital : pof. postfrontal. 



po. postorbital. 

 j. face for jugal. 

 qj. face for quadratojugal. 

 Figs. 6, 7. Frontal bone : n. face for nasal. 



prf. face for prefrontal. 

 pof. face for postfrontal. 

 Fig. 8. Parietal bone : pfo. pineal foramen. 



pof. face for postfrontal. 

 d. descending process of parietal. 

 a, posterior process of parietal. 

 Fig. 9. Vomer. 



Fig. 10. Left palate from above : m. face for maxillary. 



//. face for pterygoid. 

 V. face for vomer. 

 Fig. II. Basioccipital, bo., and basisphenoid, bs. : bopr. basioccipital process. 



ptpr. basispterygoid process. 

 Figs. 12, 13, 14. Naso-premaxillary : «o. nasal portions. 



prm. premaxillary portion. 

 fr. face for frontal. 

 Figs. 15, 16. Left maxillary: a. face for prefrontal. 

 b. face for jugal. 

 pal. face for palate. 

 V. face for vomer. 

 Fig. 17. Left pterygoid from below : pal. face for palate. 



ect. pt. face for ectopterygoid. 

 //. pr. face for pterygoid process of basi- 

 sphenoid, a posterior process of pterygoid. 

 Figs. 18, 19. Right quadrate: inner and outer view. 



Fig. 20. Portion of right exo-paroccipital, with squamosal in position, from 

 behind: po. paroccipital; sq. squamosal; a. process of squamosal for connection 

 with parietal process. 



Fig. 21. The same from front : pet. petrosal. 



