Animal – Curiosity – Octopus – Die Cephalopod 1915 – orange
Chun, C. (1915). Die Cephalopoden. (Valdevia Expedition, 1898-1899)
Stillman, S. (1912). The Cephalopoda of the Hawaiian Islands. From Bulletin of the Bureau of Fisheries, vol. 32, 1912.
Verill, A.E. (1880-81). The cephalopods of the northeastern coast of America, Vols. I, II.; Vérany, J.B. (D.1865). Mémoire sur deux nouvelles espèces de Céphalopodes trouvées dans l’océan. Scans of 2 d images in the public domain believed to be free to use without restriction in the US.
