...One of the polyps is carefully removed by the dipping-tube,a small glass tube, open at both ends...
Henry J. Slack 「Marvels of Pond-life」
...The polyp deposited in one of these water cages isthen transferred to the stage of the microscope, and itsproceedings watched...
Henry J. Slack 「Marvels of Pond-life」
...These are the stinging organs of the polyp, andresemble those which Mr...
Henry J. Slack 「Marvels of Pond-life」
...Possibly the polyp stinging organs mayhave the same structure...
Henry J. Slack 「Marvels of Pond-life」
...It is instructive tocompare the two and note how much more advanced instructure is the Polyzoon than the polyp...
Henry J. Slack 「Marvels of Pond-life」
...The best known of these “gastræads,” or “gastrula-likeanimals,” is the common fresh-water polyp (Hydra)...
Ernst Haeckel 「The Evolution of Man」
...Inthe interesting common fresh-water polyp (Hydra) the whole body issimply an oval tube with a double wall; only in this case the mouth has a crownof tentacles...
Ernst Haeckel 「The Evolution of Man」
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