Argonauta nodosa lithograph
Original caption: Plates 61-62. The Tuberculated Argonaut, or Paper-Nautilus, Argonauta oryzata
Source: http://www.museum.vic.gov.au/caughtandcoloured/collectiondetail.aspx?strCat=Mollusc&type=&IRN=1101289&pic=1101331&mIRN=213084
Artist: Arthur Bartholomew (1870s)
Source: https://commons.wikimedia.org/wiki/File:Argonauta_nodosa_with_eggcase_lithograph.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).