PLATE XXXIIL 



" In the mud appeared a species of Turbo, which, though very- 

 similar to T. Littoreus (the common Periwinkle), has some cha- 

 racters that seem to authorize its being considered as a different shell. 

 The anfr actus are much more swollen, as it were, than in the above 

 species ; the spire is more depressed ; and, besides, there is no ap- 

 pearance of stria j either transversely or longitudinally. This shell 

 has a sort of distorted or rude contour, that may, perhaps, entitle it to 

 the appellation of T. Rudis. Its colour is greenish," Puge 277, 

 vol. 1. 





