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The peculiar arrangeineiit of the transverse ribs on the surface point out at 

 first sight its chiim to a new species ; to which may be added the magnificent 

 enamelled appearance of tlie aperture. The two figures are the result of two 

 different attempts to get an exact representation of this shell, but falls short in 

 some little particulars ; and for the coloring, I have found it utterly impossible 

 to set justice done it. The figures, therefore, will only give a tolerably correct 

 idea of the general appearance of the shell, but none of its beauties. 



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