Mil 



CONTENTS. 



Page 

 B. Cochlea 78 



a. Phaneropneumona 78 



Fain. 6. Cyclophoridce 78 



a. Cyclotina. 



1. Cyclotus 79 



2. Pterocyclos 79 



3. Opisthoporus 79 



4. Craspedopoma 79 



b. Aulopomina. 



5. Aulopoma 80 



6. Cyclophorus 80 



7- Leptopoma 80 



8. AlycsEiis 80 



9. Diplommatina 80 



c. Pupinina. 



10. Megalomastoma 81 



ll.Cataulus 81 



12. Pupinella 81 



13. Pupina 81 



14. Registoma 81 



15. Callia 81 



d. Licinina. 



16. Jamaicia 82 



17. Licina 82 



18. Choanopoma 82 



19. Adamsiella 82 



e. Cyclostomina. 



20. Lithidion 82 



21. Otopoma 83 



22. Cvclostomus 83 



23. Tudora 83 



24. Leonia 83 



25. Cistula 83 



26. Chondropoma 83 



f. Pomatianina. 



27. Pomatias 84 



g. Realiana. 



28. Liarea 84 



29. Realia 84 



30. Bourciera 84 



Tain. 7- Oligyrada* 84 



1. Stoastoma 84 



2. Trochatella 85 



3. Lucidella 85 



4. Belicina 85 



•">. Alcadia 86 



Fam. 8. Proserpinida ... S(>, 188 



1. Proterpina 86, is!) 



b, Pteudopneumona 8G 



l-'am. '.). Littorimda 8(j 



1. kwiminea ^7 



J. Littorini s7 



Page 



3. Lithoglvphus 89 



4. Hydrobia 90 



5. Amnicola 90 



6. Nematura 90 



7. Risella 90 



8. Pagodus 91 



9. Echinella 91 



10. Modulus 91 



11. Fossar 91 



Fam. 10. Lacunidce 92 



1. Lacuna 92 



Fam. 11. Truncatellidce 93 



1. Truncatella 94 



2. Tonichia 94 



c. Teleobranchia 95 



Fam. 12. Planaxida 95 



a. Planaxina. 



1. Planaxis 95 



2. Quoyia 95 



b. Litiopina. 



3. Litiopa 96 



Fam. 13. Rissoadce 96 



1. Rissoina 96 



2. Rissoa 97 



3. Skenea 98 



Fam. 14. Cacidce 99 



1. Caecum 100 



2. Brochina 101 



Fam. 15. Melaniada 101 



1. Melania 101 



2. Melanatria 102 



3. Pachycheilus 102 



4. Leptoxis 102 



5. Ceriphasia 102 



6. Gyrostoma 103 



7. Hemisinus 103 



8. Vibex 103 



9. Faunus 103 



10. Melanopsis 103 



11. Clionella 104 



12. Io 104 



Fam. 16. Cerithiad<r 105 



a. Crritfiiinu. 



1. Rhinoclavis 105 



2. Cerithium 105 



S. Bittium 106 



4. Tympanotomy 106 



5. Teleacopium 106 



6. Pvra/us 107 



7. Lampania 107 



