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has been conjedlured that the Cornu Am- 

 monis^ defcribed among the foflil Shells^ 

 takes it Shape from fome Species of the 

 Nautilus ; but this is far from being 

 afcertained. 



Dentalia^ Tooth Shells. This is a fhelly 

 Tube, refembling the Tufk of an Ele- 

 phant, or the Horn of fome Animal, 

 which is a little bent : Some of them are 

 fmooth, others ftriated ; the fmooth Kind 

 are white, and not unfrequently tipped 

 with red ; the others often white, fome- 

 times green. The common Tooth Shell, 

 the Dog Tooth Shell, and others are to 

 be feen among the Specimens. 



Vermicularta^ Worm-fhells, are of a 

 very irregular Shape, and nothing but 

 a Kind of teftaceous Covering the Sea 

 Worms inhabit. They are generally found 

 in Clufters, often flicking to the Bottom 

 of Ships after a long Voyage. - i 



We are now come to a Conclufion of 

 our fmall Remarks on the Univalves, and 

 muft in a regular Progreflion proceed to 



take 



