TABLE OF CONTENTS. 



Page. 



Introductory 5 



General discussion 5 



Land shells 5 



Habitat and station 5 



Collecting outfit 7 



Localities favorable for collecting 9 



Eggs 10 



Enemies of land shells 10 



Fresh-water species 11 



Habitat and station 11 



Outfit 13 



Favorable localities 13 



Eggs 13 



Enemies and parasites 13 



Marine species 15 



Regional distribution of species 15 



Deep-sea mollusks 16 



Mollusks of the literal region . 20 



Outfit 22 



Favorable localities for shore collecting 23 



Eggs and egg cases 25 



Enemies and parasites 26 



Commensal organisms 26 



Dredging 26 



The construction and use of the dredge 26 



On the use of a dredge in a ro wboat 30 



The use of a dredge in a sailboat 33 



Use of the trawl net 33 



The trawl line 33 



The baited net 33 



Steam dredging 34 



Outfit 34 



On the use of the towing net 36 



Preservation and preparation of collections 37 



Land and fresh- water shells 38 



Marine shells 41 



Preservation of specimens intended for anatomical use 43 



Preservation of the radula 48 



The cabinet and its furniture 50 



Cases, trays, and tubes 50 



Labels 51 



Cataloguing 52 



Packing specimens 52 



Books ofreferen.ee 54 



3 



