THE BELEMNITE'S CUTTLE FISH 



are found only in the Jurassic and Cretaceous 

 formations. In fine clay specimens occur 

 showing the soft parts of the sort of cuttle-fish 

 in which they were formed (see Fig. 197). They 



Fig. 197. — Restored drawing of the %nimal in which the 

 " Belemnite " is formed. The dense pencil-Hke piece 

 lies embedded near the hinder end. (From a drawing by 

 Sir Richard Owen. ) 



are of the same character as the " cuttle-bone " 



of the living cuttle-fish and the pen of the 



squid (Fig. 198), but are more solid and heavy. 



The oldest fossils which are known are found 



271 



