PLATE CLII. 



the least trace of spines or murlcation : from the beak descend some 

 very obsolete longitudinal striae, but the surface is in general perfectly 

 smooth and glossy, notwithstanding the specimen before us has at 

 first sight a rugged aspect ; the shell having been greatly bruised or 

 mutilated in its growth, and afterwards uncouthly repaired by the ani- 

 mal inhabitant. 



