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File:The Monograph of the Gymnoblastic or Tubularian Hydroids. Plate XXI.png

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Description
English: Tubularia larynx (=Ectopleura larynx; Hydrozoa: Anthoathecatae: Capitata: Tubulariidae).
  • 1 – a hydranth from a male colony, with its long simple racemes of gonophores; magnified.
  • 2 – a hydranth from a female colony, with its shorter compound racemes of gonophores; magnified.
  • 3 – an entire, natural size.
  • 4 – a portion of the hydrocaulus, showing the interrupted annulation of the perisarc; slightly magnified.
  • 5 – summit of stem much magnified, showing the fluted collar-like expansion, a – of the ectoderm. The perisarc is continued from a point at a little distance below the collar as a thin and transparent tube over the distal portion of the stem.
  • 6 – an actinula some days after its liberation, as it is seen floating in the surrounding water; magnified. The oral tentacles, which are absent at the period of liberation, have already become developed.
  • 7 – the actinula after it has permanently fixed itself. It has developed a stem which is clothed with a chitinous perisarc, and has emitted hydrorhizal process of attachment. The young stem is excavated into a single cavity instead of being travesed be several longitudinal canals, as in the corresponding stage of Tubularia indivisa. Very distinct currents are visible through the transparent walls of the stem, as indicated by the arrows in the figure.
Date
Source Allman G. J. The Monograph of the Gymnoblastic or Tubularian Hydroids. – Conclusion of Part I and Part II. – London: Robert Hardwicke, 1972. – Plate XXI
Author
George James Allman  (1812–1898)  wikidata:Q744703 s:en:Author:George James Allman
 
George James Allman
Alternative names
G.J.Allman; George Allman; George J. Allman
Description British botanist, zoologist, university teacher and ecologist
Date of birth/death 1812 Edit this at Wikidata 24 November 1898 Edit this at Wikidata
Location of birth/death Cork Parkstone
Authority file
creator QS:P170,Q744703

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current19:05, 30 August 2014Thumbnail for version as of 19:05, 30 August 20142,531 × 3,567 (2.93 MB)Mithril (talk | contribs)=={{int:filedesc}}== {{Information |Description = {{en|1=Plate XXI from the Monograph of the Gymnoblastic or Tubularian Hydroids. The original description can be found [http://www.biodiversitylibrary.org/item/37418#page/90/mode/1up here].}} |Source...

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