A CONTRIBUTION TO THE BIOLOGY AND CYTOLOGY OF HALIPHYSEMA (FORAMINTFERA)

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SUMMARY

  • 1Haliphysema tumanowiczii Bowerbank, is an attached foraminifer and the natural variation described is such that the following forms are probably synonyms of it; H. primordiale Haeckel, H. echinoides Haeckel, H. globigerina Haeckel, and H. advena Cushman.
  • 2An unattached form of H. tumanowiczii is described which is released from the attached animal. The unattached individual moves over the substratum and eventually settles and forms the basal disc. This newly attached stage becomes a typical attached individual.
  • 3The test wall is composed of sponge spicules and other foreign matter cemented together with an acid mucopolysaccharide. On the inside of this wall, in the basal disc and first quarter of the pedicle, there is an organic sheath composed of a mucoprotein. This component is flexible and enables a form such as H. tumanowiczii to survive the rough conditions of the littoral zone.
  • 4Multinucleate and uninucleate individuals are recorded among both the attached and unattached forms.

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