TAPES.— Plate VI. 



The clefted Tapes. Sliell soiiiewhat squarely ovate or 

 globose, dull I'ulvous, tinged with livid-grey, con- 

 eeutrically ridged, ridges flattened, and plicately coii- 

 iiueut on the posterior side, jiosterior side truncately 

 angled. 



T'enus rimiilarls, Lamarck, Anim. sans vert. vol. vi. 

 ]). 3(i7. 



Tapen )'iijiidarh, Soiverby. 

 Chione rinuilarls, Desliayes. 

 Hab. ^ 



This is a form of the preceding species, without maj'k- 

 ing, in which the ridges are peculiarly flattened anil pli- 

 cately confluent. 



