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Note on the Feeding of Amphioxus (Branchiostoma bermudœ)

  • R. Dennell (a1)

Synopsis

The ciliary feeding mechanism of Amphioxus (Branchiostoma bermudœ) is dependent for its continued effectiveness on the cleaning action of a powerful current of water produced by movements of the floor of the atrium. As ciliary feeding progresses, the buccal cirri become heavily choked with particles of detritus, and the feeding current entering the pharynx is thereby reduced. When this occurs, the atrial floor is violently raised and lowered, and water is pumped in and out of the atrium by way of the pharynx and oral hood, dislodging the accumulated particles from the buccal cirri. As is to be expected, the atriopore is capable of being closed during this process.

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Andrews, E. A., 1893. Studies from Biol. Lab. Johns Hopkins Univ., v (4), 213.
Bigelow, H. B., And Farfante, I. P., 1948. Fishes of the Western North Atlantic. Chap. I. “Lancelets”. Memoir No. 1, Part I. Sears Foundation for Marine Research, Bingham Oceanographic Laboratory, Yale University,New Haven, Conn.
Grove, A. J., And Newell, G. E., 1948. Animal Biology, University Tutorial Press, London.
Orton, J. H., 1913. Journ. Mar. Biol. Ass., x (N.S.), 19.
Shipley, A. E., and MacBride, E. W., 1920. Zoology: an Elementary Textbook, University Press, Cambridge.
Willey, A., 1894. “Amphioxus and the Ancestry of the Vertebrates “, Columbia Univ. Biol., Ser. II, Macmillan, New York.

Note on the Feeding of Amphioxus (Branchiostoma bermudœ)

  • R. Dennell (a1)

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