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"Cephalopoda is a class of mollusks, the highest in organization of the division of the animal kingdom. To this class belong the Nautili, Squids, Cuttle-fish, etc. The Cephalopoda receive their name from having organs of prehension and locomotion attached to the head, an arrangement toward which a gradual approach may be traced in the highest gasteropod mollusks."—(Charles Leonard-Stuart, 1911)

Cephalopoda

"Cephalopoda is a class of mollusks, the highest in organization of the division of the animal kingdom.…

A molluscous animal, having arms furnished with sucking-cups, by means of which it attaches itself tenaceously to other bodies. When pursued, it throws out a blackish liquor that darkens the water, enabling it to escape observation.

Cuttle-fish

A molluscous animal, having arms furnished with sucking-cups, by means of which it attaches itself tenaceously…

Cuttlefish are animals of the order Sepiida, and are marine cephalopods, small relatives of squid and nautilus.

Cuttle-fish

Cuttlefish are animals of the order Sepiida, and are marine cephalopods, small relatives of squid and…

An egg-cluster of squid.

Squid Egg

An egg-cluster of squid.

A cuttle fish.

Cuttlefish

A cuttle fish.

Part of the cephalopod group. The name cephalopod is derived from two greek words which mean feet on head.

Octopus

Part of the cephalopod group. The name cephalopod is derived from two greek words which mean feet on…

"A genus of dimiliarly known as cuttle-fishes. They have eight arms, each with two rows of suckers, which are sessile or unstalked. The prominent head is joined to the body by a distinct neck, and the body itself is short, generally more or less rounded in shape, and unprovided with side or lateral fins. They have attained a notoriety from tales circulated concerning their ferocity and the existence of gigantic members of the genus, though the largest cuttle-fishes that have been met with have belonged to other genera." — Winston's Encyclopedia, 1919

Octopus

"A genus of dimiliarly known as cuttle-fishes. They have eight arms, each with two rows of suckers,…

A squid.

Squid

A squid.