86 APPENDIX. 



No. II. 



The following list of recent shells common to the European and American 

 coasts of the Atlantic, has been arranged with much care by Mr. Conrad and 

 myself, and is introduced here because it may subserve the interests of Geology : 



1. Purpura lapillus. 



2. Buccinum undatum. 



3. Natica canrena. 



4. Fusus islandicus. 



5. Cyprina islandica. 



6. Saxicava rugosa. 



7. * Lucina divaricata. 



8. Pholas crispata. 



9. costata. 



10. Solen ensis. 



11. Myaarenaria. 



12. Mytilus edulis. 



13. Modiola papuana. 



14. Mactra deaurata. 



15. Spirorbis nautiloides. 



16. Thracia convexa. 



17. Solecurtus fragilis. 



18. Glycimeris siliqua. 



19. Cardium groenlandicum. 

 20. islandicum. 



21. Strigilla carnaria. 



22. Tellina punicea. 



23. Pecten islandicus. 



24. Balanus ovularis. 



No. III. 



List of fossil shells common to the strata of Europe and America : 

 UPPER MARINE, OR OLDER PLIOCENE. 

 Lucina divaricata, Lam. 

 f Cerithium melanoides, Sow. 



• This shell is still an inhabitant of the United States, of Europe and of the West Indies : it is 

 also found fossil in England, France and the United States ; and I have also seen it in the co- 

 ralline limestone of the island of Barbadoes. " These facts," observes Mr. Conrad, " show how 

 extensive may be tho distribution, and how long the duration of a single species." 



t In England this fossil is found in the London clay. 



