. Animal physiology. Physiology, Comparative; Physiology, Comparative. CEPHALOPODA, OR CUTTLE-FISH TRIBE. 101 ceives its name from the peculiar arrangement of the arms or feet around the mouth, which is the characteristic of its members. Sometimes these arms are very broad, and united at their base into a kind of circular fin, as in the common Octopus or Poulp. Fig. 61.—Octopus or Poulp. represented in the accompanying figure ; and the body is then short and thick. In other instances the arms are short, and the body long and flexible, and furnished with a fin-like expansion behind, as in the c
. Animal physiology. Physiology, Comparative; Physiology, Comparative. CEPHALOPODA, OR CUTTLE-FISH TRIBE. 101 ceives its name from the peculiar arrangement of the arms or feet around the mouth, which is the characteristic of its members. Sometimes these arms are very broad, and united at their base into a kind of circular fin, as in the common Octopus or Poulp. Fig. 61.—Octopus or Poulp. represented in the accompanying figure ; and the body is then short and thick. In other instances the arms are short, and the body long and flexible, and furnished with a fin-like expansion behind, as in the calamary or squid. The common Cuttle-fish and its allies are destitute of any external protection ; but they usually have a flat shell, commonly known as the cuttle-fish bone, enclosed in a fold of the mantle, and lying along the back. In the Cala- mary, this is horny in its texture, and is sufficiently flexible to offer no resistance to the action of the fin-like tail, by which the animal is propelled through the water, very much in the manner of a fish. Some of the Cephalopods now existing, however, and a still larger proportion of those which peopled our seas in past ages, were enclosed in spiral shells; and these shells, preserved. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carpenter, William Benjamin, 1813-1885. London : Wm. S. Orr and Co.
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