PLATE 48 



Anastrophia verneuili (.Hall) 

 Page 100. 



Figs. 1-3. Ventral, dorsal, and anterior views. 

 Figs. 4-6. Ventral, dorsal, and side views. 

 Figs. 7-9. Ventral, dorsal, and anterior views. 



Gypidula mitlticostata Dunbar 

 Page 191. 



Fig. 10. A portion of a ventral valve with 12 plications on the fold. 



Figs. 11, 12. Anterior and ventral views. 



Fig. 13. Interior of an incomplete ventral valve. 



Fig. 14. Interior of an incomplete ventral valve. 



Figs. 15-17. Ventral, dorsal, and side views. 



Fig. 18. An incomplete ventral valve. 



Fig. 19. Anterior view. 



Rhynchotrema formosa (Hall) 

 Page 192. 



Figs. 20-22. Side, ventral, and dorsal views of the one specimen. 



