44 "27^^ Natural Hijlory Part I. 



by Jchelom ^ the Nile y Pemusy and 

 other Rivers. 

 8. Laftly. That they were not left by 

 the Seas continual flitting and Ihiftiog 

 its Chanel : this Progreffion being oc- 

 cafioned by the Seas wearing and gain- 

 ing upon one Shore, and flinging up 

 Mud, and, together with it, thefe 

 Shells, upon the other, or oppofite 

 Coafl:s, thereby making perpetual Ad- 

 ditions unto them ; which is the Opi- 

 nion of other Authors. 



Thefe Propofitions ( which are no 

 other than fo many Confeftaries drawn 

 from the Obfervations ) are, we fee, 

 all Negative) as being direded againft 

 the Miftakes of fonie who have for- 

 merly engaged in this refearch. The 

 ways they have taken to account for 

 the Conveyance of thefe Marine Bo- 

 dies to Land, are very many, as well 

 as different from each other. For 

 eager and follicitous hath the inquifi- 

 tive and better part of Mankind been 

 to bring this Matter to a fair ilTue and 

 determination, that no Stone hath 

 been left unturned, no way, whereby 

 thefe things could ever poffibly have 

 been brought forth of the Sea, but 

 one or other- of them hath pitch'd up- 

 on 



