320 



OUR COMMON BRITISH FOSSILS. 



both ends, as in Scaphites^ or they may be quite 

 straight, as in Bamlites. The Gault is remarkable 



Fig, ■^'^^.—TttrriUtes costatus. 



for its abundance of these types. In the Lower 

 Chalk they are represented chiefly by the spiral form 



Fig. 329. — Turrilites tuberatlatus. 



Turrilites, At Atherton, in the Isle of Wight, these 

 fossils occur in abundance. In the South of England 



