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Autor(en): 
  • Smithsonian Institution
  • Smithsonian Miscellaneous Collections, Vol. 16 (Classic Reprint) 
     

    (Buch)
    Dieser Artikel gilt, aufgrund seiner Grösse, beim Versand als 3 Artikel!


    Übersicht
     
    Lieferstatus:   i.d.R. innert 5-10 Tagen versandfertig
    Genre:  Naturwissensch., Medizin, Technik 
    ISBN:  9780331755060 
    EAN-Code: 
    9780331755060 
    Verlag:  Forgotten Books 
    Einband:  Kartoniert  
    Sprache:  English  
    Dimensionen:  H 229 mm / B 152 mm / D 51 mm 
    Gewicht:  1279 gr 
    Seiten:  976 
    Zus. Info:  23:B&W 6 x 9 in or 229 x 152 mm Perfect Bound on White w/Gloss Lam 
    Bewertung: Titel bewerten / Meinung schreiben
    Inhalt:
    Excerpt from Smithsonian Miscellaneous Collections, Vol. 16

    The following pages contain the results of several years' study of one of the most interesting and difficult branches of American Conchology. My ms. Was completed in and I find, upon freshly taking up the subject, that I am inclined to question many of the conclusions at which I had then arrived. A more enlarged acquaintance with fresh-water shells convinces me that a much greater reduction of the number of species than I have attempted must eventually be made; but until the prolific waters of the southern states have been systematically explored and a great collection of Specimens obtained, which shall represent every portion of those streams and include as many transitional forms as can be procured, a definitive monograph of our Melanians cannot be written. I am indebted to several kind friends for assist ance in preparing this work; first of all, to Dr. Isaac Lea, who not only gave me constant access to his noble collection, but on many occasions aided me by comparing specimens and elucidating knotty questions in synonymy. Mr. John G. Anthony, Prof. S. S. Haldeman and the late Dr. Aug. A. Gould, with great liberality, sent to me their types; and in these collections and that of the Academy of Natural Sciences of Philadelphia, I also found types of many of the species described by Say and Conrad. Most of my synonymy is derived from the direct comparison of these typical shells, and to this extent I believe my work will prove to be reliable.

    About the Publisher

    Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com

    This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

      
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