Zoology of Victoria. Mollusca.
Date 1882
Source http://www.flickr.com/photos/biodivlibrary/5998821018
Author Frederick McCoy; Arthur Bartholomew (Artist)
Full title Natural history of Victoria. Prodromus of the zoology of Victoria; or, Figures and descriptions of the living species of all classes of the Victorian indigenous animals... By Frederick McCoy...
Source: https://commons.wikimedia.org/wiki/File:Natural_history_of_Victoria_(Pl._61)_(5998821018).jpg

Argonauta nodosa, also known as the knobby or knobbed argonaut, is a species of pelagic octopus. The female of the species, like all argonauts, creates a paper-thin eggcase that coils around the octopus much like the way a nautilus lives in its shell (hence the name paper nautilus).