14 THE NAUTILUS. 



The fifth and last general catalogue was published in 1881 as 

 "Miscellaneous Publication No. 5 of the Kent Scientific Institute," 

 and was com{3iled l)y Dr. W. H. De Camp, of Grand Rapids. Dr, 

 De Caraj) has very kindly furnished me with a manuscript continu- 

 ation of his catalogue to December, 1891, and I have made frequent 

 use of it for this paper. Species cited upon his authority and not 

 included in bis original paper as published, will be understood to 

 be quoted from this suppletnent. 



In 1859 Mr. Currier published a '• List of the shells collected in 

 the Grand River Valley," and in 1865, "A Catalogue of the Mol- 

 lusca of Grand Rapids, Michigan," (Am. Jour, of Conch. I, p. 292.) 

 As Mr. Currier's catalogue of 1868 undoubtedly embodied all his 

 researches up to that time, the few particulars in which these earlier 

 lists differ from it do not require special mention, and references 

 hereafter made are to that publication. 



In the " Report of the United States Fish Commission for 

 1872-3," Mr. Sidney I. Smith, in a " Sketch of the Invertebrate 

 Fauna of Lake Superior," gives a list of the mollusks of that region 

 which, while it is largely a compilation from the publications of 

 Binney and Gould, includes the result of a series of dredgings made 

 under the direction of the United States Lake Survey, and is espe- 

 cially valuable in showing the depths at which the various species 

 were found. 



Preliminary reports of the same dredgings are to be found in 

 Vol. 2 of the "Report of the Secretary of War for 1871," and in 

 the " Am. Jour, of Sci. and Arts " for December, 1871. 



A local list of the species found near Ann Arbor, Washtenaw 

 county, was published by Mr. C. E. Beecher and myself in the 

 " Proceedings of the Ann Arbor Scientific Association for 1875-6." 

 In addition to these lists many scattered references to Michigan 

 species occur in the- American Journal of Conchology and in the 

 various writings of Binney, Gould, Lea, Tryon, Prime, Conrad and 

 Call. 



In compiling the present catalogue I have endeavored to include 

 every species which has at any time been cited as an inhabitant of 

 the State. Where any such species is not represented in my own 

 collection I have given the authority for the citation. 



In addition to my own collections, which have been mostly made 

 in the southeastern and northern portions of the state, I am indebted 

 to Dr. W. H. De Camp and Mr. L. H. Streng, of Grand Rapids, 



