Mollusca — Cephalopoda. 



the visceral dome, or by fins, but chiefly, as already slated, by the Cuttle 

 forcible expulsion of water from the respiratory chamber. 



GALLERY 

 VII. 



Fig. 20. — Mouth, feet, and foot-tentacles of common squid, LoUgo vulgaris, Lamk. 

 Britisli coast, d, dorsal anns ; /, funnel ; t, t, tentacles. (Much reduced.) 



Fig. 21. — Suckers of tentacle of Octopus. (Enlarged.) 



The mouth is armed with powerful jaws, resembling in form, 

 texture, and position, the beak of a parrot. The tongue is large and 



Fig. 22. — (A) the upper and (B) the lower beak or mandible of Architeuthis 

 monachus, Steenstrup. (Reduced to one-third nat. size.) 



