CONCHOLOGY. 



every English reader, it is presumed, a figure of the shell which 

 M. Lamarck describes, can scarcely fail to prove acceptable ; and 

 this the more especially, since it may be added that our figures are 

 expressly copied from the individual example described by M.Lamarck, 

 the specimen having been kindly communicated to us by Mr.MacXeay 

 for the purpose of our present publication. 



The annexed figures, which exhibit as well the interior as the 

 external appearance of this shell, may render any minute description 

 of the species unnecessary. The shell is of a most delicate and 

 fragile texture, of a rich and pleasing cream-coloured tint, inclining 

 to rosy ; but the most characteristic peculiarity of the shell consists 

 in the fine transverse plates, or lamellate fringes, six in number, 

 which project considerably and at nearly equal distances from the 

 sides and front; those plates flow in graceful curves, bending some- 

 what semicircularly upwards along the sides, and projecting into 

 elongated processes at the front. The colour pale roseate, tinged 

 with deeper red towards the indented edges or fringe ; the surface 

 elegantly striated, and where they terminate in the anterior projec- 

 tions there is a pretty deep sulcation, or hollow, down the middle of 

 the superior surface. 



