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JOURNAL 



PORTLAND SOCIETY OF NATURAL HISTORY, 



Art, I. — Ohservations on the Terrestrial Pulmonif era of Maine^ 

 includmr/ a Catalogue of all the species of terrestrial and flu- 

 viatile Mollusca known to inhabit the State. By Edward S. 

 Morse. 



Twenty-one years ago, Dr. J. W. Mighels, then of Portland, 

 presented to the Boston Society of Natural History a catalogue 

 of the shells of Maine, which was accepted and published by them 

 in the fourth volume of their Journal. Since that time the number 

 of species of terrestrial and fluviatile Mollusca detected in the 

 State has been nearly doubled. To make these additions known, 

 I commenced the preparation of a simple catalogue. Such cata- 

 logues, however brief, are of value in the study of geographical 

 distribution, which is rapidly becoming an element of v^st import- 

 ance in the study of Zoology. At the same time their value is 

 greatly enhanced by observations concerning the relative scarcity 

 or abundance, habits, etc., of each s^iecies. While making these 

 brief notes, I was led to examine the subject still more closely. 



This paper, the result of that investigation, is offered as a first 

 contribution to a more intimate knowledge of our native species. 



In the preparation of these pages I have received great assistance 

 from W. G. Binney, Esq., of Burlington, New Jersey, to whom I 

 feel under grateful obligations for aid, without which it Avould 

 have been impossible to present certain species in the light recently 

 thrown upon them by the labors of certain European writers. He 



JOURNAL p. S. N. H. 1 HARCH, 1864. 



J52 



