PLATE V. 



Glyptodesma cancellata. 



Fig. 1. View of a left valve. Page 227 



Nucula niotica. 

 Fig. 2-4. Anterior, left and cardinal view of a specimen. Page 222 



Nucula neda. 



Fig. 5, 6. Right and anterior view of a specimen. Page 222 



Modiomorpha charlestowiiensis. 



Fig. 7. Right view of a specimen. Page 218 



Fig. 8, 9. Profile view of two specimens. 



Conocardium cuneus. 



Fig. 10, 11. Dorsal and ventral view of a specimen. Page 203 



Fig. 12, 13, 15. Ventral views of three specimens, showing variations 



in size and ornamentation. 

 Fig. 14. Lateral view, showing shield. 

 Fig. 16. Ventral view of a young specimen. 

 Fig. 17. Dorsal view of a young, very perfect specimen. 

 Fig. 18. Side view of a young specimen. 

 Fig. 19. Enlargement of a fragment of test, showing ornamentation. 



Faracyclas ohioensis 

 Fig. 20. Right view of an average size specimen. Page 213 



