Keywords: EB1911 Cephalopoda Figs. 30, 31.—Nerve-centres of Octopus.jpg en Cephalopoda Figs 30 31 ”Nerve-centres of Octopus from Encyclopædia Britannica 1911 1911-01-01 Encyclopædia Britannica 1911 - Cephalopoda article Hugh Chisholm editor other versions PD-old-70-1923 1911 Encyclopædia Britannica Cephalopoda |