CEPHALOPODA. 



27 



midablc suckers, which make them very powerful instru- 

 ments ; and fish and other victims, when once within their 

 clutch, would find it impossible to escape. 



PiNNOCTOPUS. D'Orb. — Shell none. Animal having 

 the body with side fins, joined behind ; arms very long, 

 suckers in two rows, but small, and the arms joined by a 

 broad web at the base. 1 species. 



P. cordiformis : a native of the seas of New Zealand, is 

 the only species known. 



Moschites. Schneider. (Eledone Leach.) — Animal 

 like Polypus ; but the arms have only one row of suckers. 

 — 27 species. 



Found in European seas, and emitting a musky smell. 



Cirroteuthis. Eschricht. — Shell, an inner cartilage. 

 Animal with two transverse fins on the body ; arms almost 

 united to the tips by a cuticle^, and having one row of 

 suckers, with cirri alternately. — 1 species. 



C. Mulleri is found on the coast of Greenland. 



Argonauta. Lin. Shell monothalamous (one -cham- 



bered), symmetrical, external, elastic, very thin, and con- 

 taining the body of the animal ; spire doubly keeled. 



