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Achatina adductor Africa ammonites Animal aperture apex arms Australia bivalves Brachiopoda branchial Brit Britain Buccinum undatum Bulimus burrow byssus Cape cavity Chiton coast columella Cyrena D'Orbigny Devonian Distribution dorsal valve dredge elongated Eocene epidermis Etymology Europe external fathoms foot Forbes Fossil fresh-water fringed front gasteropoda genera genus gills Gray grooved Helix hinge horny India inner Islands Lamarck land-snails layer left valve ligament lingual teeth lobes mantle margin Mediterranean Miocene mollusca muscles muscular impressions North America oblique oblong Oolite operculum orifices outer lip oval Pacific pallial line palpi Pecten peculiar pedal peristome Philippines plates Pliocene posterior province Pupa right valve rocks Shell shell-fish side Silurian sinus siphons siphuncle South South America species specimens spiral spire strata striated Sub-genera Sub-genus Succinea Synonyms tentacles thick thin tooth truncated Type umbones uncini ventral valve West Indies whorls Zealand
Page 114 - ... found nowhere else ; there is even a difference between the inhabitants of the different islands ; yet all show a marked relationship with those of America, though separated from that continent by an open space of ocean between 500 and 600 miles in width. The archipelago is a little world within itself, or, rather, a satellite attached to America, whence it has derived a few stray colonists, and has received the general character of its indigenous productions.