Some diversions of a naturalist / by Ray Lankester.

  • Ray Lankester
Date:
[1925]
Catalogue details

Licence: In copyright

Credit: Some diversions of a naturalist / by Ray Lankester. Source: Wellcome Collection.

    23/250 page 5
    Fig. i.—A portion of the branching tubular growth formed by Rhabdopleura Normani, fixed to and spreading over the smooth surface of an Ascidian, dredged at Lervik and drawn of three times the natural dimensions. The colourless tubes (b) stand up freely from the surface to which the rest of the growth is adherent, and from each of them issues in life (as seen at bb) a polyp such as that shown in Fig. 2. Each polyp is continuous with the dark internal cord (or rod) which is seen traversing the whole of the tubular system, a, points to the main and oldest portion of the branching stem ; c, points to a “ leading ” shoot which is still adherent and will give rise to young buds right and left which will form upright tubes like b. The inset d represents a piece of the tube magnified so as to show the rings by which it is built up.
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