70 C O N C H O L O G Y. 



Ill cleaniiisT or prefervinp; Shells for ca- 

 billets, take the following hints : Let them 

 not be touched much by aqua fortis, or by 

 any other acid, as oil of vitriol, fpirit of 

 fait, or even vinegar ; nor be boiled, or 

 expofed to the heat of the fire, or fun, for 

 they greatly fpoil them. 



Many Shells are fiflied up extremely 

 beautiful and polifhed, fo perfe£lly, that 

 art cannot better it. Thefe need only be 

 ranged in their refpeclive claffes : fuch 

 are the Cowries, Tuns, fome Buccina, 

 the Volutes, and the Olives, 



Others, on the contrary, come out of 

 the fea (limy, and even fometlmes cover- 

 ed and enerufted with filth, coralline mat- 

 ter, mofs, &c. and have a pellicle or epi- 

 dermis ; fuch are the Tellens, Mufcles, 

 Snails, &c. For thcfe, firft fteep them 

 a day in hot water, to foften the filth 

 or nuO:, then brufh them very much 

 (but the bruOics fhoui4 not be too hard); 





