286 MOLLUSCA. 
numbers in the mesozoic strata. The tentacles in the 
belemnites had little hooks as well as suckers. The actual 
term “ belemnite”’ is applied usually to the fossil shell only. 
Some of the Cephalopoda reach an enormous size, and 
their whole organisation represents the highest point attained 
outside the phylum of the Chordata. 
Fig. 202.—AMMONITES oR FossIL NAUTILOID CEPHALOPODA. 
[TABLE. 
