30 MOLLUSCA. 
which Linnzeus, 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 Histotre Na- 
turelle des Coquilles, des Vers et des Crustaces, 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. Coqurttes MuLTIVALVES. 
1. Les unes n’ont point de charniére. 
Oscabrion, Anatif, Balanite. 
2. Les autres en ont une. 
Pholade, Taret, Fistulane, Anomie, Calceole. 
II. Coqui~ties BIVALVEs. 
i. Equivalves. 
1. A charniére sans dents. 
Pinna, Modiole, Moule, Anodonte. 
2. A charniére garnie des dents. 
A. A une dent. 
Mulette, Crassalette, Paphie, Mactre. 
B. A deux dents. 
a. Simple. Trigonie, Tridacne, Hyppope, Cardite, Lu- 
traire, Petricole, Venericarde, Solen, Capse, Sanguino- 
laire. 
b. Avee des surnumeraires. Isocarde,' Donace, Cyclade, 
Telline, Venus. 
C. A quatre dents. 
Bucarde, Mérétrice, Lucine. 
