E. RAY LANKESTER. TABLE OF CONTENTS. THE SHELL GALLERY. GENERAL NOTES ON MOLLUSCA 1 SYSTEMATIC ARRANGEMENT 7 AMPHINEURA (Chitons, etc.) 7 GASTROPODA (Marine Univalves, Land-Snails, etc.) 9 LAMELLIBRANCHIA (Bivalves, Oysters, Cockles, etc.) 29 CEPHALOPODA (Octopus, Cuttlefish, etc.) 45 INDEX TO PRINCIPAL GENERA OF MOLLUSCA 51 GENERAL NOTES ON POLYZOA 54 │CLASSIFICATION 57 AN ACCOUNT OF THE BRACHIOPODA 74 │CLASSIFICATION 77 AN ACCOUNT OF THE TUNICATA 83 │ARRANGEMENT 90 THE STARFISH GALLERY. GENERAL ACCOUNT OF THE ECHINODERMA 106 CRINOIDEA (Lily Stars, etc.) 112 ASTEROIDEA (Starfishes) 113 OPHIUROIDEA (Brittle-Stars) 114 ECHINOIDEA (Sea-Urchins) 114 HOLOTHURIOIDEA (Sea-Cucumbers) 115 ──────┬──────────────────────────────────────────────────────────────── VERMES│PLATYHELMINTHES (Tapeworms, etc.) 116 „ │NEMATODES (Round-worms, etc.) 118 „ │ANNULATA (Marine Worms, Earthworms, Leeches) 122 THE SHELL GALLERY. GENERAL NOTES ON MOLLUSCA. The Mollusca constitute one of the principal divisions of the Animal Kingdom, and include such animals as the Octopus, Cuttlefish, Snail, Slug, Whelk, Cockle, and Oyster. [Sidenote: Definition.]