PLATE XLI. 



Fig. Page. 



1. Bittium reticulatum (Da Costa). Recent. (Harmer Collection) . 414 



2. Ditto. Aldeby. (Ipswich Museum) . . . .414 



3. Ditto. Ramsholt. (York Museum) . . . .414 



4. var. trinodosa (Etlieridge and Bell). St. Erth. (Harmer Collection) . 416 



5. Bittium punctulum (S. V.Wood). Walton-on-Naze. (British Museum) 418 



6. Ditto. Little Oakley. (Harmer Collection) . . .1-18 



7. Bittium lacteum (Philippi). Little Oakley. (Harmer Collection) . 416 



8. Ditto. Recent. (Harmer Collection) . . . .416 



9. Bittium robustum, sp. nov. Scaldisien, Antwerp. (Harmer Collection) 41 7 



10. Ditto. Little Oakley. (Harmer Collection) . . .417 



11. Lxocochlis granosa (S. V. Wood). Cor. Crag. (Cambridge Museum) . 427 



12. Ditto. Little Oakley. (Harmer Collection) . . . 427 



13. Ditto. Cor. Crag. (Harmer Collection) . . . -127 



14. Cerithiopsis Barleei, Jeffreys. Little Oakley. (Harmer Collection) . 419 



15. Ditto. Recent. (Harmer Collection) .... 419 



16. Cerithiopsis Metaxse (Delle Chiaje). Recent. (Harmer Collection) . 422 



17. Ditto. Recent. (Harmer Collection) .... 422 



18. Ditto. Cor. Crag, Sutton. (British Museum) . . . 422 



19. Ditto. Boyton. (Jermyn Street) . . . .422 



20. Cerithiopsis tubercularis (Montagu). Boyton. (Jermyn Street) . 420 



21. Ditto. Recent, (Norwich Museum) .... 420 



22. Cerithiopsis minium (Brusina). Cor. Crag, Sutton. (Norwich Museum) 423 



23. var. ovoides, Cerulli-Irelli. Cor. Crag, Sutton. (Norwich Museum) 423 



24. Newtoniella (Seila) trilineata (Philippi). Cor. Crag. (Cambridge 



Museum) . . .... 424 



25. Triforis pern< j r*<t (Linne), var. adversa (Montagu), (ledgrave. (Jermyn 



Street) . . . . . .425 



26. Aporrhais pes-pelicani (Linne). Gedgrave. (Harmer Collection) . 432 



27. Ditto. Recent, (Harmer Collection) .... 432 



28. Ditto. Little Oakley. (Harmer Collection) . . . 432 



29. Ditto. East Winch. (Norwich Museum) . . . 432 



30. var. minor, Bucquoy, etc. Boyton. (Harmer Collection) . 434 



31. Aporrhais Uttingerianus (Risso). Scaldisien, Antwerp. (Harmer 



Collection) ...... 435 



32. Ditto. Italian Miocene. (Harmer Collection) . . . 435 



33. Aporrhais Serresianus (Michaud). Recent, Bergen. (Harmer Collection) 436 



34. var. Macandrese, Jeffrej^s. Scaldisien, Antwerp. (Harmer 



Collection) . . . . .437 



