Cephalopoda. 



143 



serving them may cause them to dart off like so many arrows. 

 There is a rudimentary ear. Some authors say that the squid 

 has the five senses which are best known in our bodies. 



The Squid used as Bait. Squids are used very extensively as bait 

 in the cod fishery, a single small vessel sometimes using eighty thou- 

 sand in six weeks. They are caught mainly by means of nets. They 

 are either kept fresh for this use, or may be " pickled" in brine. 

 They are also used in fishing for bluefish. 



FIG. 95. OCTOPUS, FROM BRAZIL. 



From Packard's Zoology. 



Giant Squids. Some species of squids have a body over nine feet 

 long, with arms thirty feet in length. Some of these may have given 

 rise to the stories of "sea serpents." 



The Octopus. As the name indicates, these forms have eight arms 

 instead of ten, as in the squids and cuttles. The body is short and 

 nearly spherical. Though the octopus can swim, it is very much less 

 active than the preceding forms, spending most of the time crawling 

 over the bottom, resting on the basis of the circle of arms with the body 

 held above. The arms are more or less connected by webs at the base. 

 There is neither internal nor external shell. A Pacific coast octopus has 

 body a foot long, the arms having a radial spread of twenty-eight feet. 



