XU BRITISH FOSSIL SHELLS. 



Pl. X. Chiton 1 , a.s /ascicularis. Patella 18. Acme 23. Propi- 

 lidium, as Teciura, 24. Dentalium 26, 27. Capulus 28. Calyp- 

 trsea 29. 



Pl. XI. Pissurella 1, as graca. Puncturella 3. Emarginula 5, 6. 

 Trocbus 8, 10, 11, 12, as paplllosus, 15, 16, 17, 19. Margarita 21. 

 Adeorbis 25. Scissurella 26. 



Pl. XII. Paludina 9. Valvata 10. Littorina 14. Lacuna 27. 



Pl. XIII. Rissoa 3*, as Paludestrina subumbilicata, 7, 11 ?, 13 ?, 



15, 23, 27.^ 



Pl. XIVT Rissoa 2, 9, as Chemnitzia. Aclis 24, as Alvania ascaris, 

 25, as Chemnitzia ti. 



Pl. XV. TurriteUa 2. Aporrbais 4. Caecum 6, 7. Cerithium 9, 10. 

 Ceritbiopsis, as Cmi!/«?/M, 11. Scalaria 17, 19, 20. Eulima 22, 25. 



Pl. XVI. Cbemnitzia 1, 2, as similis, 4, 8. Natica 13, 17, as Catena, 

 19, as Gru;nk?idica. Velutiua 21. Trichotropis 26. 



Pl. XVII. Odostomia 1, 8, as plicata, 9, as plicata, 10 ?, 12. 



Pl. XVIII. Purpura 5. Buccinum 10? Pusus 15, as Trophon, 



16, as Tr., 17, as Tr. gracile, IS, as Tr. T., 19, as Tr.p. Trophon 22, 24. 

 Pl. XIX. Nassa 1, 2. Mangelia, as Clavatula, 4, 5, 8, as Philberti, 



9, 11, as BootJiii, 12, 14, 15, 17 ?, 21, 22. Erato 27. Cyproea 28. 



Pl. XX. Tornatella 1, as Actaon tornatilis. Ovula 3, as Bulla. 

 Cylicbna, as Bulla, 4, 5, z&regulbiensis, 7, 9, 12. Bulla 19. Pbiline 

 as Btillcea, 21, 22. Scaphander, as Bulla, 26. 



Pl. XXI. Limnsea 1, 4, 7, 11. Planorbis 18, 24, as complanatits, 

 and in the upper fresh-water formation, all except 9, 11. 



Pl. XXII. Succinea 1, 3. Conovulus 5, and in the more recent 

 fresh-water deposits, all except 7 and 13 to 16. 



Pl. XXIII. Hebx 19, 22, and upper fresh-water, all except 1, 12, 

 14, 15, 24, 25, 26. 



Pl. XXIV. Upper fresh-water deposits, all except 16, 24. 



