30 MOLLUSCA. 



which Linnaeus, in his too great desire to simplify, had sup- 

 pressed, and the accommodation of the divisions of the 

 science to those new relations which a more extensive know- 

 ledge of species had discovered. In this number Bosc stands 

 eminently conspicuous. In his work entitled Histoire Na- 

 turelle des Coquilles, des Vers et des Crustacea, and in the 

 conchological articles of the Dictionnaire d> Histoire Na- 

 turelle, he has favoured the world with a detail of his sys- 

 tem, the outline of which we shall here present to our rea- 

 ders : 



I. COQUILLES MULTI VALVES. 



1. Les unes n'ont point de charniere. 



Oscabrion, Anatif, Balanite. 



2. Les autres en ont une. 



Pholade, Taret, Fistulane, Anomie, Calceole. 



II. COQUILLES BIVALVES. 

 i. Equivalves. 



1. A charniere sans dents. 



Pinna, Modiole, Moule, Anodonte. 



2. A charniere garnie des dents. 



A. A une dent. 



Mulette, Crassalette, Paphie, Mactre. 



B. A deux dents. 



a. Simple. Trigonie, Tridacrie, Hyppope, Cardite, Lu- 

 traire, Petricole, Venericarde, Solen, Capse, Sanguine - 

 laire. 



b. Avec des surnumeraires. Isocarde, Donace, Cyclade, 

 Telline, Venus. 



C. A quatre dents. 

 Bucarde, Mere trice, Lucine. 



