MAKE A MEME View Large Image Conchological Manual Figs 40-42.png Varices are caused by periodical rests or stoppages in the growth of the shell when the edge of the aperture thickens and renders the shell as complete as when full grown Fig 40 numerous; 41 few ...
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Keywords: Conchological Manual Figs 40-42.png Varices are caused by periodical rests or stoppages in the growth of the shell when the edge of the aperture thickens and renders the shell as complete as when full grown Fig 40 numerous; 41 few continuous; 42 few discontinuous gutenberg A Conchological Manual 43417 1842 George Brettingham Sowerby II 1812 “1884 PD-old-100 A conchological manual 1842
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