CONTENTS. ix 



PAGE 



11. Papua and New Ireland 103 



12. Australian Eegion 103 



13. South Australia and Tasmania 104 



14. New Zealand IO4 



15. Polynesian Eegion : Salomons, New Hebrides, New 



Caledonia, Feejees ; Friendly, Navigator's, Society 

 Islands ; Low Coral Islands ; Sandwich Islands 104 



16. Canadian Regions : New England 106 



17. Atlantic States 107 



18. American Eegion 108 



19. Oregon and California 109 



20. Mexican Eegion 109 



21. Antilles 110 



22. Columbian Eegion ; Galapagos Ill 



23. Brazilian Eegion 112 



24. Peruvian Eegix)n 113 



25. Argentine Eegion 114 



26. Chilian Eegion : Juan Fernandez 114 



27. Patagonian Eegion : Fuegia, Falklands 115 



CHAPTER III. 



Distribution of the Mollusca in Time. — Geological Table; 

 distribution of Species in the Strata ; of Genera ; table of 

 Characteristic genera ; table showing range of genera ; range 

 of families ; numerical development in time. — Order of appear- 

 ance of groups of shells ; order of succession. — Migration of 

 species and diffusion of Genera in former times. — Method of 

 Geological investigation. — Tertiary Age. — Secondary Age. — 

 Palaeozoic Age. — Numerical estimate : living and foosil 

 species 117 



CHAPTER rV. 



On Collecting Shells. — Land-shells; elevation on mountains. 

 — Fresh-water shells. — Sea-shells, littoral species ; floating 

 mollusca : the towing-net ; trawling ; kettle-nets ; deep-sea 

 fishery ; trapping whelks ; di'edging 136 



Dredging papers, by M'Andrew and Barrett, Norway 144 



Dredging papers, by Forbes, 2Egea,n 148 



Zones of depth : littoral ; laminarian ; coralline ; deep-sea coral 

 zone 151 



Preservation of Molluscous animals for examination 153 



