400 



NATURAL HISTORY. 



ARGONAUTA. (Lat. a sailor in the ship Argo.) 





. Argo (Lat.), the Argonaut or Paper Nautilus. 



and it is from these that the beautiful shell is secreted. The 

 Argonaut propels itself through the water by violently ejecting 

 water from the tube with which it, as well as the cuttle-fish, 

 is furnished for that purpose. The colours of the living animal 

 of the Nautilus are exceedingly beautiful. 



The arms of this creature are furnished with suckers. Its 

 shell, when the creature is living, is flexible and semi-trans- 

 parent. 



The fossil Ammonites belong to the testaceous Cephalopoda, 



