507.7 i 



PRELIMINARY LIST OF NEW YORK UNIONIDiE 



INTRODUCTION 



Unless otherwise stated all the species in the following 

 list are represented in the collection of the New York State 

 Museum by specimens from localities within the limits of 

 the state of New York or from the Alleghany river at War- 

 ren, Penna., just south of the New York boundary. A name 

 printed in italics indicates that the species has been included 

 without positive evidence that it inhabits New York. 



This list has been prepared for distribution among conch- 

 ologists with a view to obtaining data bearing upon the 

 geographical distribution of the Unionidse inhabiting the 

 state of New York. For this reason the names of the 

 species have been arranged alphabetically and a space for 

 notes has been left under the name of each species. 



Recipients are requested to furnish the undersigned with 

 all information in their possession regarding: 



1 The general distribution of each species. 



2 The distribution of each species in the state of New York. 



3 The causes which tend to restrict or extend the habitat 



of each species in the state of New York. 



4 The reasons why there are numerous species in the 



waters of the western part of the state and few 

 species in the waters of the eastern part. 



The general distribution of each species can be given by 

 a list of all localities in which the species is known to occur; 

 or by a list of selected localities which will serve to show 

 the streams inhabited by the species and the extreme points 

 at which it has been found. 



The distribution of each species in the state of New York 

 can be best shown by a list of all localities in which the 

 species is known to occur. 



