List of Plates 



PLATE 



BETWEEN PAGES I I4 AND II5 (iN COLOr) 



1 The Five Classes of Mollusks 



2 Pacific Coast Abalones 



3 Turbans, Top-shells, Star-shells 



4 Nerites, Purple Sea-snails, Sun-dials 



5 Conchs, Tritons, and Moon-shells 



6 Cowries 



7 Sea-whip snails 



8 Living Flamingo Tongues on the Rough Sea-whip, Miiricea 

 muricata Pallas 



9 Bonnets, Tuns, and Frog-shells 



10 Murex Shells and Royal Tyrian Purple 



1 1 Spindles, Dwarf Olives and Marginellas 



12 Olive Shells 



13 Atlantic Tulips, Spindles and Volutes 



14 Atlantic Cones 



1 5 New England Nudibranchs 



1 6 Pacific Coast Nudibranchs 



BETWEEN PAGES 2IO AND 211 (iN BLACK AND WHITe) 



17 Atlantic Coast Univalves — Limpets and Arenes 



1 8 Pacific Coast Univalves — Limpets and Tegulas 



1 9 Atlantic Coast Univalves — Periwinkles and Ceriths 



20 Pacific Coast Univalves — ^Periwinkles and Nassas 



2 1 Atlantic Coast Univalves — Worm-shells and Trivias 

 2 2 Atlantic Coast Univalves — Wentletraps and Cones 



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