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Megalocranchia fisheri, ventral view of type.
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Male of Ocythoe tuberculata Raf. (=Philonexis catenulatus, Fer.), Mediterranean, showing three stages, A, B, and C., in the development of the hectocotylus arm; h.cy, hectocotylus still in the cyst; c'y', spoon-shaped cyst at the end of the arm when freed; th, thread-like organ freed by the rupture of c'y'....
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Architeuthis dux, largest of the three known species of giant squid, may reach 16 meters (50 feet) and weigh nearly a ton
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Internal bone of Sepia officinalis.
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Two stages in the development of Loligo vulgaris Lam.; a,a, first and a2,a2 second pairs of arms; br, branchiae, seen through m, mantle; e, e, eyes; f, fins; fu, funnel; v.s, vitelline sac. 1895. Loligo--Development.
cc-publicdomain
Two stages in the development of Loligo vulgaris Lam.; a,a, first and a2,a2 second pairs of arms; br, branchiae, seen through m, mantle; e, e, eyes; f, fins; fu, funnel; v.s, vitelline sac.
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Amphitretus pelagicus Hoyle, off Kermadee Is..
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Stoloteuthis iris, ventral view of type [31[.
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Octopus Americanus. From a painting made at Tortugas, Fla., by Herbert B. Judy.
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Argonauta argo (Linnaeus).
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Ommastrephes hawaiiensis, ventral view of type [243].
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Octopus Alberti, d'apres Joubin (face ventrale).
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