xil BRITISH FOSSIL SHELLS, 



Pl. X. Chiton 7, as fascicularis. Patella 18. Acme 23. Propi- 

 lidiurn, as Tectura, 24. Dentalium 26, 27. Capulus 28. Calyp- 

 traea 29. 



Pl. XI. Fissurella 1, as grceca. Puncturella 3. Emarginula 5, 6. 

 Trochus 8, 10, 11, 12, as papillosus, 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 Paluclestrina subumbilicata, 7, 11 ?, 13?, 



15, 23, 27. 



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

 25, as Chemnitzia n. 



Pl. XV. Turritella 2. Aporrhais 4. Caecum 6, 7. Cerithium 9, 10. 

 Cerithiopsis, as Cerithium, 11. Scalaria 17, 19, 20. Eulima 22, 25. 



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

 19, as Groenlandica. Velutina 21. Trichotropis 26. 



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



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



16, as Tr., 17, as Tr. gracile, 18, 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 Boothii, 12, 14, 15, 17 ?, 21, 22. Erato 27. Cyprsea 28. 



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

 Cylichna, as Bulla, 4, 5, as regulbiensis, 7, 9, 12. Bulla 19. Philine 

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



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

 and in the upper fresh-water formation, all except 9, 1 1 . 



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

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



Pl. XXIII. Helix 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. 



