An Introduction to Conchology; Or, Elements of the Natural History of Molluscous Animals

adductor muscle Anat animal aperture apex Aplysia appears Ascidia attached bivalves Blainville blood body Brachiopods branchiæ branchial branchial cavity Brit Buccinum byssus calcareous canal cavity Cephalopods character coat colour Conchology Cuvier deposited distinct edge Edinb eggs external families fish fluid foot furnished Gasteropods genera genus gills Helix Heteropods Hist inner Journ Lamarck latter layer less ligament Linnæus Lister living Loligo manner mantle margin membranous Milne-Edwards Mollusca mollusks motion mouth multivalve muscular mussels nacre natural naturalists Nautilus Nudibranches observed opercula operculum organs orifice outer oysters Patella pearls Pecten peculiar periostracum Phil Pholas placed posterior Pteropods remarkable respiration respiratory rocks says secretion shell shell-fish side similar siphon skin slugs snail species specimens spiral spire stomach structure substance surface tentacula Teredo testaceous tion Trans transverse tribes tube Tunicata univalves valves vessels whorls Zool