MOLLl'SCA 



257 



argo, the paper nautilus (Figs. 266 and 267), has membra: 

 attached to two of the arms, and with these, as well as the mari- 



ne 266. Argonauto argo, the paper nautilus; female in shell. (After Claus.) 



tie, secretes a delicate, slightly coiled shell, within which she 

 sits ; it is not fastened to the body of the animal and serves 

 chiefly as a sort 

 of nest for the 

 eggs. The male 

 is much smaller 

 than the female, 

 and, like the 

 other Octopoda, 

 is without a 

 shell. The oc- 

 topus, or devil- 

 fish (Fig. 268), 

 belonging to the 

 genus Octopus, 

 is represented 

 by several spe- 

 cies. They are probably not as bad as they are painted, and 

 in the countries about the Mediterranean are largely used for 

 food. Some species attain a great size, like the Octopus vulgaris 

 s 



Fig. 267. Argonauto argo, the paper nautilus ; shell. (After 

 Parker and Haswell.) 



