1843 li st contains 113 marine, 38 fresh-water and 23 land 

 species, or a total of 174 species. Morse in his 1864 list gives 

 55 fresh-water and 50 land species, or a total of 105 species. 

 In his published lists from 1874 to 1884, Verrill enumerates 

 196 marine species and 7 varieties. While the present list 

 includes 256 species and 13 varieties of marine, 82 species and 

 20 varieties of fresh-water and 65 species and 5 varieties of 

 land shells, thus showing quite a growth in our knowledge of 

 the mollusca of Maine. 



In working up local faunas the following field naturalists have 

 done excellent work and added much to our knowledge of the 

 shells of Maine : Olof O. Nylander in Aroostook ; Anson Allen 

 at Orono ; John A. Allen in the towns of Hebron and Buckfield, 

 Oxford county; Arthur H. Norton, curator of the Portland 

 Society of Natural History, in Cumberland county; Dr. W. C. 

 Kendall at Freeport and Eastport; Rev. Henry W. Winkley 

 at Eastport, Islesboro, Wiscasset, Old Orchard and Casco Bay; 

 Edwin P. Went worth and wife at Newcastle, Lincoln county 

 and South Portland, Cumberland county; Prof. J. S. Kingsley 

 of Tufts College, in Casco Bay; Dwight Blaney, dredging in 

 Frenchman's Bay, seasons from 1901 to 1906; John B. Hender- 

 son, Jr., and George H. Clapp at Kennebunkport and at Bar 

 Harbor; H. S. Colton at Mt. Desert; Edward W. Roper in 

 Cumberland, Piscataquis and Waldo counties ; Henry Jackson, 

 Jr., at North Haven, Penobscot Bay; Charles W. Johnson, 

 curator Boston Society of Natural History, at Deer Isle in 

 Moosehead Lake ; and the author in Knox county. 



Many of the above collectors have published in local lists the 

 results of their collecting, for the main part in the several 

 volumes of the Nautilus. In 1901 Prof. Kingsley's "Prelim- 

 inary Catalogue of the Marine Invertebrata of Casco Bay" was 

 published in vol. 2 of the proceedings of the Portland Society 

 of Natural History. This list includes 154 species of marine 

 mollusca. In 1904 Blaney's "List of Shell-bearing Mollusca of 

 Frenchman's Bay, Maine," was published in vol. 32, No. 2. of 

 the Proceedings of the Boston Society of Natural History, and a 

 supplemental list in Nautilus, vol. 19, p. noiii. 



The State has been only partially explored as yet conchologi- 

 cally; Casco, Eastport and Frenchman's Bays having been the 



