[From Annals of the Lyceum of Natural History in New York, Vol. VI., p. 80. April, 1854 j 



XVI. Descriptions of New Fluriaiile Shells of the Genus MELA- 

 Lam., from the Western States of North America. 



By JOHN G. ANTHOXY, Esq., of Cincinnati, Ohio, Corresponding Member. 

 Read January 30 and February 27, 1854. 



In June, 1853, the writer entered upon a pedestrian tour 

 through the States of Kentucky, Tennessee, and part of Georgia, 

 with the double purpose of renovating health, and of collecting 

 the numerous and varied species of fluviatile shells with which 

 our Western streams and rivers abound. The journey was 

 extended as far as Macon, in Georgia, when heavy and con- 

 tinuous rains arrested further progress, by swelling the streams 

 so high as effectually to debar all collecting. From the unusual 

 fulness of most of the other streams visited during the journey, 

 the number of Naiades obtained was restricted, but large quan- 

 tities of Jlelanidce were collected. Some of these were of old 

 and well known species; others represented species which, 

 though already named and described, are as yet little known 

 in collections, or have been described from solitary or imperfect 

 examples. The species named and characterized in the follow- 

 ing pages, with others to appear hereafter, consist, for the most 

 part, of the new acquisitions made during this journey. 



The author regrets his inability to give a more precise state- 

 ment of habitat than that here assigned to most of his species ; 

 but the precautions he had taken for keeping his collections 

 distinct proved insufficient, and he, therefore, prefers to merely 

 name the State in which they were taken, viz. Kentucky, 

 Tennessee, &c., rather than misstate the stream where found. 

 The waters from which the specimens were collected were so 



MARCH, 1854. 1 ANW. LYC. NAT. HIST., VOL. VL 



