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Polypus ornatus, dorsal view of a medium sized male from Honolulu.
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Amphitretus pelagicus Hoyle, off Kermadee Is..
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Tremoctopus violaceus, dorsal view of specimen....
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Squid--Octopodia are true scavengers, eating anything eatable which comes in their way.
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Shell of Argonauta argo (Linnaeus).
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Eledone aldrovandi Delle Chiaje, Naples, from Ventral Side.
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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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Tremoctopus violaceus, ventral view of large female from station 2930.
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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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Octopus Alberti, d'apres Joubin (face ventrale).
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Tremoctopus violaceus, lateral view of adult male, from station 4086, with nearly ripe hectocotylus.
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Octopus vulgaris Lam., Naples:. A, at rest; B, in motion; f, funnel, the arrow showing the direction of the propelling current of water
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Argonauta argo.
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Octopus brevisses (D'Orbigny).
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Octopus macropus (Risso).
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Argonauta argo, side view of shell.
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Pinnoctopus corodifformis (d'Orbigny).
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Alloposus mollis, ventral view of small female, from the Pailolo Channel.
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Argonauta papyracea, as it swims by means of its locomotive tube.
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Octopus lentus Baird, N. Atlantic, showing the peculiar formation of the hectocotylus arm, h.a..
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Cephalopods. Alloposus mollis Verrill; Young Male, Arm of Same, Young Female, Dorsal view of Same
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Argonauta papyracea in its shell.
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Portion of the radula of Octopus tetracirrhus D. Ch., Naples.
