FOSSIL CEPHALOPODS. 



397 



has been a great desire to find the source of that 

 mystical power — the " thunder-bolt." 



In Kent, Cambridgeshire, and elsewhere, the 

 rounded masses of iron pyrites originally formed in 



55^^ 



Y'lg. 2%Z.—Belemnites Fig. 289. — Belemnites pnzosiamts Fig. 290. — Restoration 

 hastata (Lias). (guard and part of phragmacone). of an ancient Belemnite. 



the chalk, and subsequently denuded out of it, are 

 called by this name. When broken, such masses 

 (about as big as one's fist, or less) have a radiated 



