MOLLUSCA. 



295 



Cephalopoda. — The Cephalopoda are the Cuttlefish, Nautilus, 

 Squid, &c. In these we find a distinct head, and the mouth is 



Fig. 172. — Common Calamary. 



A, A Cephalopod (Loligo vulgaris) ; a, ordinary tentacle ; t, long tentacle, b, Internal 

 .shell, c, side view of one of the suckers, d, front view of head ; a, bases of arms ; t, 

 tentacles ; m, mouth ; /, funnel. (Nicholson.) 



surrounded by a circle of arms which bear numbers of suckers. 

 The arms are divisions of the foot. These molluscs, many of 

 which have an internal shell (Sepia, Loligo), are carnivorous 



