PALEONTOLOGY. 

 PLATE VII. 



Page. 

 Syncyclonema bigida H&M 383 



Fig. 1. Enlarged view of an interior cast of a right valve, showing the filling of the carti- 

 lage pit and what appears to he the muscular impression. 



Pteria linguifoemis E. & S 384 



Fig. 2. View of the left valve of an imperfect specimen. 



Fig. 3. View of the right side of the same, showing the muscular marking and pallial line. 



Pteria (Oxytoma) nebeascana E. & S 385 



Fig. 4. View of a large left valve, natural size. 



Pteeia (Pseudopteeia) fibeosa M. & H 386 



Fig. 5. Eestored view of a left valve. 



Pteria (Pseudopteeia) sublevts Whitf 387 



Fig. 6. View of left valve of the ordinary size and form, preserving the small anterior wing. 



Inoceramus baeabini Morton 398 



Fig. 7. View of an imperfect right valve of this form. 



Inoceramus vanuxemi M. & H 396, 398 



Fig. 8. View of a small individual representing the var. subcircularis M. 



Fig. 9. View of a left valve representing the form referred by Mr. Meek to I. proximus 



Tourney. 

 Fig. 10. View of a left valve of the variety described in this vol. p. 398. 



Inoceeamus problematicus Schlot. ? 389 



Fig. 11. View of an imperfect specimen of a right valve referred with doubt to this species. 



Inoceramus sagensis O 393 



Fig. 12. View of a right valve of rather large size, presenting the ordinary features of the 

 species. 



