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Note on Two Unrecorded Plumularian Hydroids from the Plymouth Area

Published online by Cambridge University Press:  11 May 2009

James Ritchie
Affiliation:
Royal Scottish Museum, Edinburgh.

Extract

Confusion has reigned in the works of British authors as to the relationship between Plumularia catharina, Johns., and a more simple form, with unbranched stem, found, like the former, on many parts of the coast. Johnston and Hincks, and the majority of their successors, have recorded the simple form, where it was thought worthy of mention, as a “stemless variety” of the former; but examination of the type specimens of P. catharina in the British Museum has proved that a fundamental distinction exists between the two forms. P. catharina is a branched species and bears on each side of a hydrotheca a pair of lateral sarcothecce; the other is a branchless, bristle-like form, bears on each side of a hydrotheca a single lateral sarcotheca, and has been long known as Antenella (or Plumularia) secundaria (Gmelin).

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1914

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References

* See Ritchie, , “Note on the Type Specimens of Plumularia catharina,” etc., Proc. Roy. Physical Soc., Edinburgh, Vol. XIX, 1913, p. 1.Google Scholar

Crawshay, , Journ. Marine Biol. Association, Vol. IX, 1912, pp. 279 and 330.Google Scholar

* Ann. Mag. Nat. Hist., ser. 4, Vol. XIX, 1877, p. 148, P1. 12, Figs. 2–6.