SECTION II. 



THE CLASS OF CEPHALOPODA OR CEPHALOPODS. 



SUB-SECTION I. 



THE CEPHALOPODS CONSIDERED AS A CLASS. 



THE Argonauts or Paper-sailors, Cuttle-fishes, Squids, 

 and other Cephalopoda, have a mouth armed with a stout 

 beak, resembling that of a parrot, a large eye on each 

 side of the head, and, surrounding the mouth, long, mus- 

 cular arms, or tentacles, covered with cup-like suckers, 

 by means of which they cling with the greatest firmness 

 to whatever they lay hold of. 



FIG. 530. 



Oral view of the Mandibles and '-arms " of a Cepbalopod t, pedunculated tentacles 

 with their enlarged extremities c ; rf, dorsal arms ; /, funnel. 



The Cephalopoda are marine, and many kinds have 

 within the body a sac containing an ink-like fluid with 



