Anatomy of Nautilus Date 1855
Source (1 January 1855). "On the Anatomy of Nautilus umbilicatus, Compared with That of Nautilus Pompilius". Philosophical Transactions of the Royal Society of London 145 (2): i–xii+1–178+i–vi+179–424+1–16. ISSN 02610523.
Author John Denis Macdonald
Source: https://commons.wikimedia.org/wiki/File:Nautilus_anatomy_1855_01.png
