CONTENTS. 



SECOND PART. 



PAGE 



II. Subclass OSCULOSA, ... 889 



Legion III. NASSELLARIA vel MONOPYLEA, . 889 



Order 11. NASSOIDEA, .... 895 



12. PLECTOIDEA, . . . 898 

 ,, 13. STEPHOIDEA, . 



14. SPYROIDEA, .... . 1015 

 15. BOTRYODEA, . 



16. CYRTOIDEA, ... 1126 



Legion IV. PH^ODARIA vel CANNOPYLEA, . 1521 



Order 17. PH.EOCYSTINA, 



' 18. PH^EOSPH^ERIA, . . 1590 



19. PHJEOGROMIA, . !642 



20. PH.EOCONCHIA, . ^710 



NOTE ON THE DIMENSIONS AND MEASUREMENTS, . . 1760 



ADDENDA, . 1761 



EKRATA, . !763 

 INDEX, . 



