MOLLUSCA. 



265 



Cephalopoda. — The Cephalopoda are the Cuttlefish, Nautilus, 

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



Fio. 139. — Common Calamary. 



A, A Ceph.alnpnrl (Lnl-igo vvlgaris) ; a, ordinary tentacle ; t, long tentacle, b, internal 

 flhell. c, side view of one of the suckers, d, front view ot head ; a, bases of arms ; (, 

 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, LoUr/o), are carnivorous 



