8 



are lost, or at least only appear in the form of tubercles 

 upon the uppermost carina ; the sutures are few, and 

 hardly distinguishable, except by the spines they are 

 furnished with ; these spints are only two in num berj 

 except in some few specimens which have a third obscure 

 carina, and such have three spines ; the aperture is nearly 

 round with a small angle at its upper part ; the left lip 

 is raised from the columella ; the canal of the beak is 

 almost covered over. Smith in his " Strata identified by 

 organic Fossils," has figured this upon the Green Sand 

 plate without a name ; the name above given, was found 

 attached to some specimens in a dealer's hands, but we 

 know not upon what authority. 



Found in the Green Sand of Blackdown. 



