FOSSIL MOLL USC A. 



269 



muddy ooze (now white chalk) of the Cretaceous 

 sea-bed, to which its valves could be attached. It 



Fig. z^o.Turitella 

 Fig. 249. Z?/ac0ra J^rzata (Cretaceous), granulata (Greensand). 



was thankful to settle down as spat on any surface 



Fig. 252. Chama squamosa (Lower 

 Fig. 251. Spondylus spinosus. Cretaceous). 





Fig- 253- Gervillea anceps (Greensand). 



which presented itself whether a dead "fairy-loaf," 

 the bone of a decomposed cuttle-fish (Belemnite), the 



