[ 47 ] 
Character, to be Ranged among the Cham £ ; and as 
they have a Brobofcis which none of the Mytuli 
have, I would aifo offer the following Name for 
this Fifh } 
Chama longa rugis after is , alba. The long rough 
white Chama. 
Mr. Baker has fhewn me another Species of Bho- 
las , which he lately took out of a Stone from the 
Coaft of Cornwall and which has more of the 
‘Pettuncle than any other kind, in its Form, Cardo> 
and fhutting clofe; which the Shells juft mention'd 
cannot do: Now thefe three diftind Kinds of Shell- 
Fifh can never be faid to be rightly called by the 
Tingle Name of *P ho las. 
The common Objection to thefe Fifh boring 
their Way into the Stones in which they are found, 
‘Viz. that the Stones are firft in a foft State, and fo 
harden about them, may be obviated by the follow- 
ing Confiderations : Firft, that in Mr. Mores great 
Stone, when it was broken, there appear'd thro’ its 
Subftance feveral petrify’d foflil Shells j which clearly 
fhew that its Formation was of an ancienter Date 
than the Age of thefe Mufcles can admit, of. Se- 
condly, That the Holes on the Surface are narrower, 
in general, than the Cavity in which the Fifh lies ; 
and which demonftrates, that they enter young, and 
are capable of enlarging their Room as they grow 
bigger, by abrading the Sides of their Cells : And 
this is further apparent, by the Tandy Matter found 
in the Bottoms of thofe Cells, which the Fifh can- ‘ 
not well get rid of, when it happens, that the Ori- 
fice is higher than the Bottom 5 Abundance of which 
Mr, 
