150 THE ELEMENTS 



F. 



Fasciated, filleted, -or covered with 

 bands. 



Fascicled, clustered together as in a 

 bundle. 



Fastigate, flat and even at top. 



Faux, what can be seen of the cavity 

 of the first chamber of the shell, by 

 looking in at the aperture. 



Ferruginous, of an iron colour, or rust 

 coloured. 



Filament, a slender thread-like pro- 

 cess. 



Filiform, thread-shaped, slender and 

 of equal thickness. 



Fissure, a cleft, a little slit, or narrow 

 chasm. 



Flexous, zigzag, with angles gently 

 winding. 



Fluviatic, of or belonging to a river. 



Foliated, bent into lamina? or leaves. 



Fornix, the excavated part under the 

 umbo. It likewise signifies the 

 upper, or convex shell in the Ostea* 



