OBSERVATIONS. 



I first discovered this shell in the vicinity of Cincinnati. 

 It afterwards occured near Council Bluff on the Missouri? 

 and it is frequently found in Indiana. I have no doubt it is 

 an inhabitant of the greater part of the Western States. 



My description of this shell was published in the year 

 1821. Lamarck's description of his H. Richardi did not* 

 appear until April 1822, but he quotes by anticipation 

 Ferussac's Hist. desMoll. No. 174, for the specific name^ 

 which was however not then published in that work, but 

 appeared in the Tableau Systematique of the latter author 

 in the earlier part of the same year. The name of pro^ 

 funda has therefore the priority and consequently must be 

 adopted. 



REFERENCE TO THE PLATE^ 



Fig. 3, Inferior and from view&> 

 PL 87. 



