320 



OUR COMMON BRITISH FOSSILS. 



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

 straight, as in Baculites. The Gault is remarkable 



Fig. 528.- Turrilites costatus. 



for its abundance of these types. In the Lower 

 Chalk they are represented chiefly by the spiral form 



Fig. 329. Turrilites tuberculatus. 



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

 fossils occur in abundance. In the South of England 



