Sentence Examples


  • This form of nephridia leads to the shorter but essentially similar organs in the Polychaete Sternaspis, and to those of the Echiuroidea (q.v.) and of the Gephyrea.
  • Of these 6, the two first to be considered are very plainly separable and represent the extremes of Polychaete organization.
  • A further fact must be considered in deciding this question, which is the discovery of ramifying coelomic tubes, approaching close to, but not entering, the epidermis in the Polychaete Arenicola.
  • Cleavage leads to the formation of an epibolic gastrula and ciliated embryo which hatches as a free-swimming larva remarkably like that of a Polychaete worm (D).
  • Polychaete worms, in particular their giant cells and nerve fibers.

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