TAB. I: 
Fig. 
. Ostrea edulis, page 13. 
a. specimen with united valves. 
4. outside of lower valve of var. sinuata. 
ce. specimen with united valves, var. spectrum. 
— 
2. Ostrea Princeps, p. 17. 
a. outside of lower valve. 
4. ditto of young specimen. 
3. Anomia striata, p. 11. 
outside of upper or imperforate valve. 
