148 CONCHOLOGY. 



I never knew a fingle inftance of a Ha- 

 liotis being found foffil. PI. II. fig. 4, re- 

 prefents a Haliotis or Sea Ear. 



The third family is the Vermiculi, or 

 Worm Shells. The definition of this fami- 

 ly is, tubular cylindrical Shells, fingle, in 

 mafles together, or adherent to other Shells 

 or bodies. Varioufly finuous, by winding 

 or twifting to and fro in a very irregular 

 manner. The Vermiculi in general are of 

 no determinate or fixed regular (hape, from 

 their windings and tvviftings. But as there 

 are fome fpecies which either wholly, or 

 in particular parts, have a regular form ; 

 and others which have a kind of concame- 

 rated ftrufture ; and in that only differ 

 from the generality of them, as the Wa- 

 tring-pot, and the Chambered Worms ; I 

 Ihall conftitute a particular genus for them. 

 Thus the Vermiculi will range under 

 two genera, viz, 



1, Ver- 



