S E C T I O N XL 24t 



5. I'he length of a Bivalve is from the 

 beak or hinge to the very oppofite ex- 

 treme. PI. VII. fig. u 8. dd. 



6. The breadth is from fide to fide. 

 PI. VII. fig. I, 8. ee. 



7. The margins or borders are faid X.0 

 be Jimilar^y if equally produced or ex- 

 tended from the fummit, or of equal length; 

 PI. VI. fig. J, 2^ 1O9 II ; ^^d dijfimilar ^ if 

 unequal or more extended on one fide than 

 on the other. PI. VI. fig. 2, 4, 5, 6, and 

 8. Pi. VII. fig. I, 5, 10, II, and 12. 



8. The Hinge (Cardo), ftriflly fpeak- 

 ing, is the very part that conne6ls the 



* Conchae aequilaterae funt Conchce ex utroquc car- 

 dinis latere aequaliter effufae. 



Conchae insequilaterae funt Conchse ex utroque car- 

 dinis latere inaequaliter effula. 



R two 



