• On the variation and inheritance of some morphological characters inOphryoscolex purkynjei (Infusoria Oligotricha)

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    • Abstract


      1. The branched spines ofO. purkynjei represent very complicated protoplasmic structures.

      2. The number of branches in the spines ofO. purkynjei varies from 2–4 in different members of the same population and in different spines of the same individual.

      3. Every population possesses a somewhat different character of branching, which circumstance proves the existence of several different strains or races in the species named.

      4. Spine I possesses in the highest degree a tendency to form plus-variations, while spine III is characterized by its disposition to minus-variations. This character remains true for all the populations examined.

      5. The examination of 50 individuals in the late stages of fission proves that the newly arising spines of anterior daughter-individuals may very often differ in the number of branches from the corresponding old spines of posterior daughter-individuals. This difference manifests itself in an increased, as well as in a decreased, number of branches in the new spines.

    • Author Affiliations


      V. Dogiel1 T. Fedorowa1

      1. Zootomical Laboratory of the University of Leningrad, Russia
    • Dates

  • Journal of Genetics | News

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