...With thesefew preliminary remarks we may now take up in turn these different groups,beginning with the lowest, or the Polyps... 
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...The class of Polyps is divided into three orders,—the Halcyonoids, theMadreporians, and the Actinoids...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...Of the lowest among these orders, theActinoid Polyps, our Actinia or sea-anemone is a good example...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...The third and highest order of Polyps is that of the Halcyonoids...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...But we must not leaveunnoticed one very remarkable Hydroid Acaleph (), not found in ourwaters, and resembling the Polyps so much, that it has long been associatedwith them...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...The Millepore is a coral, and was therefore the more easilyconfounded with the Polyps, so large a proportion of which build coralstocks; but a more minute investigation of its structure (Figs...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...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」
...However this may be, the polyps, andsimilarly endowed creatures, have the power of dartingout their poison threads with considerable force, andMr...
Henry J. Slack 「Marvels of Pond-life」
...The creatures presented an organizationhigher than that of polyps, for there was anevident differentiation and complication of parts...
Henry J. Slack 「Marvels of Pond-life」
...In many of the lower animals (such as sponges, polyps, and medusæ) the nakedova retain their original simple appearance until impregnation...
Ernst Haeckel 「The Evolution of Man」
...The uni-axial Gastræa became sessile, and gave rise to two stems, theSponges and the Cnidaria (the latter all reducible to simple polyps like thehydra)...
Ernst Haeckel 「The Evolution of Man」
...From these simplest forms of sexual propagation, as we can observe them to-dayin the lowest Zoophytes, the Gastræads, Sponges, and Polyps, we gather mostimportant data...
Ernst Haeckel 「The Evolution of Man」
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