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Scientific American, Vol. 45, No. 11 (1881) (1881)
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estone bearing univalves to those on the black bottom could hardly be distinguished. protect them from intruders, Fig. 5.—Opereulum of Natica heros. Many other animals also adopt similar methods for protec- Fig. 3 is one of the most common of our eyestone bear- tion. These curious and puzzling… … branchial filaments (two hundred and fifty on stomachic difficulties. each side). The suckers, forty on each side, Fig. 4 is one of the most beautiful operculums THE OCTOPUS. © 1881 SCIENTIFIC AMERICIAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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