e 
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 spines are only two in num ber? 
except in some few specimens which have a third obscure 
carina, and such have three spines ; the aperture is nearl y 
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 66 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. 
