38 
It does not appear that either of them has been pre- 
viously described* 
Mitra graniformis is the nearest given by Lamarck ; 
it is longer and wants the transverse sulci. Voluta 
obsoleta of Brocchi has a similarly ornamented surface 
but it is much longer and sharper in form, and has but 
three plaits upon the columella. 
