in marshy districts Immediately behind the sand-hills of 

 the coast. In Florida they also occurred on elevated 

 mounds of Oyster shells, called Hammocks and generally 

 in such situations as were tenanted by Succinea campes- 

 tris. Nob. On these elevations they were generally small, 

 translucent and of a fragile consistence, and we observed 

 that they obtained their greatest developement only in the 

 low, marshy places. Mr. Elliott of Charleston, South Ca- 

 rolina, since favoured me with living specimens from 

 near that city, where, he informed me, they are not very 

 abundant. These individuals refused such vegetable food 

 as I could procure for them, (in December,) but one of 

 them devoured the animal of a helix which was in the ves- 

 sel that contained them. Lister's figure above quoted is 

 referred to with doubt by Ferussac in his Tab. Syst. p. 

 57, for his Helix goniostoma. 



In Lesueur's collection are specimens w^hich he found 

 at St. Francisville on the Mississippi, and Mr. Titian Peale 

 found specimens on the Florida Keys. So that, taking the 

 above mentioned localities into consideration, this shell 

 seems to be an inhabitant of the whole alluvial region, 

 from at least the middle of South Carolina to the Missis- 

 sippi, and perhaps even still farther south. 



In the American Edition of Nicholson's Encyclopedia I 

 published an account of this species under the name of 

 Polyphemus glans. I supposed it to be th-at species, as 

 Montfort says it lives in the interior of Louisiana. But 

 Ferussac says that our shell is not the glans of Bruguiere^ 

 which is not an inhabitant of Louisiana, but of St. Domin- 

 go. In his general observations, as well as in a letter to me, 

 he says it is the Buccinum striatum of Chemnitz and Bu- 



PXATE XX. 



