mil 



THE VOYAGE OF H.M.S. CHALLENGER. 



SECOND PAET. 



II. Subclass OSCULOSA 



Legion III. NASSELLARIA vel MONOPYLEA, 



Order 11. Nassoidea, 



12. Plectoidea, . 



13. Stephoidea, . 



14. Spyroidea, 



15. boteyodea, 



16. Ctrtoidea, 



Legion IV. PH/EODARIA vel CANNOPYLEA, 



Order 17. Ph^ocystina, . 

 „ 18. PaaiosPH^RiA, 

 „ 19. Ph^ogromia, . 

 „ 20. Ph^oconchia, 



Note on the Dimensions and Measurements, 



ADDENDA, 



EREATA, ....... 



INDEX, . . ' 



PAGE 



889 



889 



895 



898 



931 



1015 



1103 



1126 



1521 



1542 

 1590 

 1642 

 1710 



1760 



1761 



1763 



1765 



