TAB. VII. 



Fig. 



1. Ostrea velata, page 33. 



b. outside view of upper valve, showing the broad striae. Mus. Edwards. 



2. Ostrea picta, p. 28. 



Mus. Brit. 



3. Ostrea Bellovacina, p. 17. 



a. outside view of lower valve, from Peckham. Mus. Edwards, 



b. inside of upper valve, from Peckham. The exterior of this specimen is free 



from radiating costaa. Mus. Edwards. 



c. portion of the outside of upper valve of another specimen from Peckham. 



Mus. Edwards. 



4. Ostrea inflata? p. 26. 



Mus. Edwards. 



5. Ostrea Vectiensis, p. 32. 



a. inside view of right valve. Mus. Jermyn Street. 



b. „ left valve. „ 

 ( ? Ostrea gryphina. Eorbes.) 



c. inside of upper valve of a very thick (old?) specimen, much elevated. 



Mus. Jermyn Street. 



( ? Ostrea Spamacensis.) 



6. Ostrea gryphovicina, p. 25. 



a. outside view of lower valve. Mus. Wetherell. 



b. inside of the lower or left valve, showing the linear hinge-area. Mus. 



Bowerbank. 



7. Ostrea cyathula? p. 19. 



