224 



very distinctive character in this genus, that of a slight- 

 ly projecting or salient angle, running along the colu- 

 mella. Sowerby mentions, that some fossil species are 

 found in the neighbourhood of Paris, and in the London 

 clay, but all of them small. 



Phasianella bulimoides Phasianella lineata 



rubens nebulosa 



variegata sulcata 



elegans Mauritiana 



Peruviana angulifera. 



• 



TURRITELLA. 



turbo duplicatus. — Linnceus, 



Sowerby s Genera, No. 12. pi. 1. 



Former Naturalists, having only been guided by the 

 general form of the shell, and not taking advantage of 

 the indications pointed out by the different formation of 

 the mouth, gave the name of Screws indiscriminately 

 to the very long turret ed shells, and blended them with 

 the Scalariae, Turritellse, Turbines, and Cerithiae, each 

 of which has differently characterized apertures. — 

 The present genus may easily be distinguished from 



