Manual of Conchology, Structural and Systematic, Vol. 8: With Illustrations of the Species; Naticid�, Calyptr�id�, Turritelidd�, Vermetid�, C�cid�, ... Turbonillid�, Pyramidellid� (Classic Reprint) - Hardcover

Jr., George Washington Tryon

9780666178640: Manual of Conchology, Structural and Systematic, Vol. 8: With Illustrations of the Species; Naticid�, Calyptr�id�, Turritelidd�, Vermetid�, C�cid�, ... Turbonillid�, Pyramidellid� (Classic Reprint)

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ISBN 10: 066617864X ISBN 13: 9780666178640

Publisher: Forgotten Books, 2018

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Excerpt from Manual of Conchology, Structural and Systematic, Vol. 8: With Illustrations of the Species; Naticid�, Calyptr�id�, Turritelidd�, Vermetid�, C�cid�, Eulimid�, Turbonillid�, Pyramidellid�

The Nidus (pi. 7, figs. 44, 45) is unlike that of any other mollusk in form and composition, being built up largely of the sand of the sea-bottom, agglutinated into a strap, forming part of a circle, and provided on one side with a constriction or rim the walls contain the eggs, arranged in quincunx order.

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