228 PYRAMIDELLID.E. 



Species of Pusionella. 



aculeiformis, Lam. graudis, A. Adams. 



albociucta, Petit. lirata, A. Adams. 



buccinata, Lam. Nifat, Adans. 



Candida, Phil. Reclusiana, Petit. 



Catelini, Petit. subgranulata, Pelit. 



Fam. PYRAMIDELLID^. 



Tongue unarmed, teeth none or rudimentary. Ten- 

 tacles broad, folded, ear-shaped, connate at the base, 

 bearing the eyes immersed at their inner sides. Mantle 

 enclosed, with a rudimentary siphonal fold. Foot produced 

 and truncate anteriorly, with a fold or mentum in front. 



Operculum horny, subspiral, with the columellar margin 

 sinuated. 



Shell turreted ; aperture entire or not produced into a 

 canal in front; columella plaited. 



The species of this group are all marine, and, from the 

 circumstance of their possessing a retractile proboscis, 

 are probably predacious and carnivorous in their habits. 



Genus pyramidella, Lamarck. 



Shell turreted, many-whorled, longitudinally ribbed; 

 spire elevated, nucleus sinistral ; aperture obovate, some- 

 what produced and channelled in front; columella curved, 

 with three or more oblique plaits; outer lip acute. 



Si/n. Pyramidellus, Montf. 



Ex. P. auris-cati, Cliemnitz, pi. 24, fig. 4, 4, a. Oper- 

 culum, P. auris-cati, 4, h, 4, c. Shell, P. auris-cati, fig. A,d. 



