412 



FOSSILS OF INFERIOR OOLITE. 



[Ch. XX. 



Fig. 424 Fuller's Earth (h, Tab., p. 377).— Between 



the Great and Inferior Oolite, near Bath, an - 

 argillaceous deposit, called " the fuller's earth,""" 

 occurs ; but it is wanting in the north of Eng- 

 land. It abounds in the small oyster presented 

 in fig. 424. The number of mollusca known in 

 this deposit is only 22, viz. 17 lamellibranchiate 

 bivalves, 4 Brachiopods, and 1 Cephalopod (Belemnites giganteus). 



Inferior Oolite. — This formation consists of a calcareous freestone, 

 usually of small thickness, which sometimes rests upon, or is replaced 

 by, yellow sands, called the sands of the Inferior Oolite. These last, 



Ostrea acwmmata. 

 Fullers Earth. 



Fig. 425. 



Fig. 426. 



Kff. 42T. 



Terebratula fimbria. Ehynchondla spinosa. a. Pholadomyafidicula. I nat size. Inf. 0©1. 

 Inferior Oolite. Inferior Oolite. b. Heart-shaped anterior termination of same. 



Fig. 428. 



Fig. 429. 



Ik. 



Pleurotomaria granulata. PlQwrotomaria omata, Sow. sp. CoUyrites ringens. 



Ferruginous Oolite. Normandy. Inferior Oolite. Inf. Ool.. Somersetshire. 



Inferior Oolite, England. 



Fig. 431. 



Ammonites IFwnphresianus, Sow. Inferior Oolite. 



