232 CO NCHOLOGY, 



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S E C T I O N XL 



I AM now come to the fecond diviiioii 

 of Shells or Bivalves ; that is, double 

 Shells, or conipofed of two pieces or parts, 

 which, by means of proper connexion by 

 hinges, play on each other, fo as to open, 

 iliut, and perform all other fun6lions ne^ 

 ceflhry to the (economy or ways of Hfe of 

 the animals included in them, or whofe 

 habitations they are. 



In relation to the fifh or animals, I have 

 already given fome little account ; nor {hall 

 I further trouble my readers on the fub- 

 jeft, as my fyftem or method is built only 

 on the habitations or Shells, and not oa 

 the animals, or any of their parts. 



This divlfion of Bivalves may be arranged 

 Into three general parts, to wit, 



Part 



