CONTENTS 



Plate XXVI. Unio niger. 

 ,, XXVII. Unio gibbosus. 

 „ XXVIII. Unio teres. 



yyiy 5 Fig. 1, Unio Sageri. 

 " AA1A ) „ 2, Unio lapillus. 

 ,, XXX. Unio fragilis. 



Erratum. — Page 53, tenth line from bottom, for "extremely obtuse," 

 read extremity obtuse. 



NEW FRESH WATER SHELLS OF THE UNITED 



STATES, &c. 



For sale by J. Dobson, a few copies of this work, which contains 

 coloured illustrations of bivalve and univalve shells, and embraces a 

 monography of the genus Anculotus. Most of the species described 

 in this book were obtained by the author in Alabama. 



