14 



LINN^AN ARRANGEMENT. 



LiniiEBUs's genera are as follow : 

 MuLTivALVES. BivALVEs. UAr/r'.iLr£s witli a regular spirc. 



1. Chiton. 



2. Lepas. 



3. Pholas. 



4. Mya. 



5. Solen. 



6. Tellina. 



7. Cardium. 



8. Mactra. 



9. Donax. 



10. Venus. 



11. Spondylus. 



12. Chama. 



13. Area. 



14. Ostrea. 



15. Anomia. 



16. Mytilus, 



17. Pinna. 



18. Argonauta. 



19. Nautilus. 



20. Conus. 



21. Cypreea. 



22. J3r<//a. 



23. Fo/jifa. 



24. Buccinum. 



25. Strombus. 



26. Murex. 



27. Trochus. 



28. T2/rZ>o. 



29. He//x. 



30. Nerita. 



31. Haliotis. 



Univalves without a regular spire. 



32. Patella. 



33. Dentalium. 



34. Serpula. 



35. Terec/o. 



To this arrangement, though far surpassing any thing which 

 preceded it, there are still some few objections. The nearer 

 any artificial arrangement can be brought to a natural one, 

 the nearer it obviously approaches to perfection. With this 

 view of the subject, it must be observed that the three genera 

 of Multivalves have no connection with each other, as far as 

 regards the animal, and very little in regard to the shell. 

 The animal of the Chiton approaches nearer to the animal of 



