PLATE XXXI. 



Fia. Page. 



1. Bela scalaris (MoWer). Waldringfield. (Ipswich Museum) , . 278 



2. Ditto. Butley. (Ipswich Museum) . . . .278 



3. Ditto. Isle of Man. (Harrison Collection) . . . 278 



4. Ditto. Recent, northern seas. (Harmer Collection) . . 278 



5. Bela rugulata, Troschel. Little Oakley. (Harmer Collection) . 279 



6. Bela scalaris (Moller). 



var. ecarinata, Gr. 0. Sars. March gravels. (Harmer Collection) 280 



7. ditto. Little Oakley. (Harmer Collection) . . 280 



8. ditto. Recent, Karlso. (Stockholm Museum) . . 280 



9. var. ahi/fisicola, Friele. Butley. (Harmer Collection) . 280 



10. ditto. Recent. (Stockholm Museum) . . .280 



11. Bela rugulata, Troschel. Boyton. (British Museum) . , . 282 



12. Ditto. Recent. Greenland. (Stockholm Museum) . . 282 



13. var. scalaroides, G. 0. Sars. Recent, northern seas. (Stockholm 



Museum) . . . . . .283 



14. ditto. Hollesley. (Harmer Collection) . . . 283 



15. var Schneideri, nov. Little Oakley. (Harmer Collection) . 284 



16. ditto. Boyton. (Crowfoot Collection) . . . 284 



17. Bela nohilis (Moller). Boyton. (Crowfoot Collection) . . 281 



18. Ditto. Little Oakley. (Harmer Collection) . . .281 



19. Ditto. Recent, Iceland. (Stockholm Museum) . . . 281 



20. Ditto. Butley. (Harmer Collection) . . . .281 



21. Ditto. March gravels. (Harmer Collection) . . . 281 



22. Bela rugulata, Troschel, var. hergeiiMx, Friele. Bramerton. (Norwich 



Museum) ...... 284 



23. Ditto. Recent, Iceland. (Stockholm Museum) . . . 284 



24. Bela decnssata {Co\\t\\o\\j). Recent, Greenland. (Stockholm Museum) 289 



25. Ditto. East Runton. (Norwich Museum) . . . 289 



26. Ditto. Bridlington. (Headley Collection) . . . 289 



27. var. inflata, Posselt. Bridlington. (Headley Collection) . 289 



28. var. conoidea, G. O. Sars. Recent, Finmark. (Stockholm 



Museum) ...... 290 



29. ditto. Bramerton. (Norwich Museum) . . . 290 



30. Bela mitrula (Loven). Recent, Tromso. (Harmer Collection) . 286 

 3L Ditto. Bramerton. (Norwich Museum) . . . 286 



32. Bela exaraia (Moller). Recent, Greenland. (Harmer Collection) . 285 



33. Ditto. Bramerton. (Norwich Museum) . . , 285 



