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NHW YORK STATE MUSEUM 



The New York State Museum has what may be considered an 

 exhaustive collection of the mollusca of the Hudson river and 

 Champlain and Erie canals in the vicinity of Albany and Troy. 



J. B. Quintard has collected in Kansas and Indian Territory. 

 The general localities supplied by William A. Marsh have 

 enabled me to give an idea of the general distribution of the 

 species. 



In almost all cases the localities supplied by one correspondent 

 have been verified and made trustworthy by being reported by 

 one or more other correspondents. In many cases several have 

 reported a species from the same locality, and in other cases the 

 species while not reported by several from exactly the same 

 locality have been reported from different points in the same 

 river system. There are only a few instances in which the 

 occurrence of a species in one of the drainage systems rests upon 

 the authority of one person. The extensive series of exchanges 

 made by most of the gentlemen who have been named, one with 

 another, and with others not mentioned, has had the effect of 

 defining most of the species. It has been a council in which 

 collectors with limited opportunities have had the advice and 

 criticism of those having greater facilities, such as access to 

 literature and large collections, etc., and in which those already 

 well equipped have been still more abundantly supplied with 

 data from which to draw conclusions. 



Several gentlemen to whom copies of the preliminary list were 

 sent have given me much information bearing upon the questions 

 asked, Kev. W. M. Beauchamp, of Baldwinsville, N. Y.; Shelley 

 G. Crump, of Pittsford, N. Y., and James Delancy and Rev. John 

 Walton, of Rochester, N. Y., have sent me large series of the 

 shells of their respective localities. 



Prof. R. Ellsworth Call, Mr. Bryant Walker, Dr. V. Sterki, 

 Mr. A. A. Hinklev, Mr. S. M. Luther, Dr. W. D. Hartman, Mr. J. 

 B. Quintard, Mr. William A. Marsh, Mr. Charles T. Simpson, 

 Mr. Horace F. Carpenter, Mr. George M. Leslie, Dr. S. Hart 

 Wright, Rev. Henry Winkley, Mr. Thomas Morgan and Mr. F. 

 R. Latchford have sent me extensive lists of localities in which 

 New York Unionidas occur, and several of them have contributed 

 specimens. To all these gentlemen I wish to express sincere 

 thanks for the kind assistance they have afforded me. 



