7. Capulus, Mont. (Patella Hungaiica, Lin.) detached from its shell and 

 seen on one side. ' 



a. The foot. 



b. A sort of ruff which this foot 



has in front. 



c. The muscle which attaches 



the foot to the shell. 



d. The trunk. 

 ee. .. tentacula. 



f. . . liver and a part of the viscera, 

 which occupy the bottom 

 of the shell. 



8. Onchidium, under view. 



9. Parmacella, seen on the back : the shell has been taken away, and only 



its impression remains. - < 



10. The horned Planorbis, with its shell. 



11. The animal of the Cyprcea. 



12. .. .. .. Conus. 



13. Emarginula entire. 



14. Nervous system of the Fissurella. 



15. Animal of the Crepidula, detached from its shell, seen above; the ab- 



domen and branchial cavity in their natural position. 



16. Shell of the Crepidula seen underneath. 



a. Plate which retains the point of the abdomen. 



17. Animal of the Crepidula, detached from its shell, and the upper parti- 



tion of its branchial cavity turned back to shew the branchise. 



48. Testacellus halyotideus, animal and shell. 



» 



