PLATE 47 



Stropheodonta (Leptostrophia) planulata (Hall) 

 Page 187. 



Figs. 1, 2. Partially exfoliated, incomplete ventral valves. 



StrophoneUa punctitlifera (Conrad) 

 Page 188. 



Figs. 3, 4. A partial cast of the interior of an incomplete ventral valve, and the corre- 

 sponding partial interior of the valve 

 Fig. 5. Interior of a portion of a ventral valve. 

 Fig. 6. Interior of an incomplete ventral valve. 



Leptaenisca concava (Hall) 

 Page 189. 



Figs. 7-12. Ventral and posterior views of three incomplete shells. 



Figs. 13, 14. Incomplete ventral valves. 



Fig. IS. Dorsal view. 



Fig. 16. Interior of a portion of a ventral valve. 



Anastrophia verneuili (Hall) 

 Page 193. 



Figs. 17, 18. Interior of parts of dorsal valves. 



Fig. 19. Interior of a portion of a ventral valve. 



Fig. 20. Dorsal view of an incomplete shell with unusually fine plications. 



Fig. 21. Dorsal view of a specimen with relatively coarse plications. 



