PYRAMIDELLA. 



Lamarck unites the Genus Pyramidella w\t\\ Tornatella, 

 to form his family Plicaces, they are marine shells, and 

 therefore ought not to be confounded with the Auriculce, ^ 

 we nevertheless are of opinion that some of Lamarck's 

 Auriculee should, under the generic term Conovulus, be 

 added to this family; those species to which we allude, 

 are the Voluta Coffea, Linn, and some others that are 

 related to it; they may all be distinguished from the true 

 Auriculce, by the want of an epidermis, and from the 

 Volutae, by their having no canal at the lower end of the 

 aperture. We are also of opinion that still another 

 Genus should be constituted from those Lamarckian Au- 

 riculce, such as A. Dombeyana, Lam. and Volutes jiuviatilis 

 et fluminea, Maton,* which are inhabitants of fresh 

 waters. We do not know enough of their animal inhabit 

 tants, or of their habits to enable us to state their proper 

 affinities. 



Fig. 1. Pyramidella Terebellum, Lam. 



2. terehellata; Turbo Terehellumy Chciljn. 



3. maculosa^ Lam. 



4. Magnified points of a young fossil Pyramidella. 



* Linn. Trans, x. p. 330, tab, 24, f, 13, 14, 15, 



I 



