CHAPTER IX. 

 BRANCH MOLLUSCA. 



CLASS CEPHALOPODA. 



THE cephalopods include such forms as the squid, 

 cuttlefish, and chambered nautilus. 



The Squid. The squid is the best example of the group. 

 It is abundant along the Atlantic coast. Squids swim in 

 schools, and are frequently found following schools of 

 young herring and mackerel, on which they feed. They 



FIG. 94. COMMON SQUID. 



From Packard's Zoology. 



are chiefly nocturnal, though not infrequently seen in the 

 daytime. After a storm the writer has seen the beaches 

 on Cape Ann covered with them in the morning, where 

 they have been left stranded by the receding tide. 



The Form of the Squid. Seen from above the body ap- 

 pears cylindrical. At the anterior end is a well-developed 



