Advanced in Marine Biology, Vol. 17 by J.H.S. Blaxter, Frederick S. Russell, Maurice Yonge (Eds.)

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By J.H.S. Blaxter, Frederick S. Russell, Maurice Yonge (Eds.)

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For some species, however, the resultant numbers of filaments make elucidating the structure more difficult than working from sections. (ii) For surface of peripheral utricles. The diameters of the peripheral (primary) utricles and surface detail are obtained from a 44 L. HILLIS-COLINVAUX thin slice of a bit of surface from about the centre of a segment. Place it in a drop of water on a slide making certain the outer surface is outermost, decalcify with 20% hydrochloric acid, drain excess acid with a tissue and refloat in water.

The practice was continued into the nineteenth century with the work of naturalists such as Lamarck (1813) and Lamouroux (1812,1816), but the term “zoophyte” was replaced with the preferred “polypier”. More significantly, Lamouroux subdivided the coralline group into a number of genera. One of these was Halimedea (1812) or Halimeda (1816), to which he transferred the five species delimited by Ellis. The generic name we now use had been born. Another name, Sertolaria, with Imperato’s Sertolara. , 1956).

Of especial interest to Ellis were the “Corallines”, a group of calcareous and horny sea organisms which he successfully established as an animal group in his classic “Essay Towards a Natural History of the Corallines” of 1755, although Peyssonnel had somewhat earlier recognized an animal nature in at least some of them (Savage, 1948). This coralline group was diverse, and although the principal represent at’,ives were various cnidarians, the complex also included calcareous sen organisms such as the green alga Halimeda and the red alga Corallitm.

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