A manual of the land and fresh-water shells of the British Islands / with figures of each of the kinds. By William Turton, M. D.

  • Turton, William, 1762-1835.
Date:
1840
Catalogue details

Licence: Public Domain Mark

Credit: A manual of the land and fresh-water shells of the British Islands / with figures of each of the kinds. By William Turton, M. D. Source: Wellcome Collection.

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    PREFACE. Tue Introduction to this edition contains, Ist, an explanation of the means which I have used to improve the work; 2dly, an account of the species which I have reason to believe had been, from various causes, erroneously introduced into works of this kind, and the grounds on which they have been here rejected ; 3dly, a sketch of the geographical dis- tribution of the species, as compared with the rest of the world, and with different parts of our own country. I fear that this part of the subject, which has been here taken up for the first time, from the poverty of the materials at my disposal, is not so perfect as it should be; but it is to be hoped, that readers living in different parts of the country (now that their observation is directed to the subject) will pay more attention to it, so that in future editions of the work it may be carried out in a more complete manner. It should be observed, that the whole value of the lists, and of the table, must depend on the accurate determin- ation of the species, which is of the first importance ; while the extent of the list (which appears to be the general pride of the local collector) is of a very secondary consideration. Since this part of the work was printed, Mr. Forbes has presented to the British A 3