Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 ALCYONARIA. 473 3. MADREPORARIA or coral - producing polyps with a definite number of tentacles—in most cases in multiples of six (appar- ently only four in the Cyatliopliylloid corals, all of which are fossil); as Madrepores, Porites, Astraeas, Maeandrinas, etc. SUB-SECTION II. THE ORDER OF ALCYONARIA OR SEA-PENS, SEA-FANF ETC. THE Alcyonarians are polyps which have eight long- fringed tentacles around a narrow disk, and which form communities by budding. The ' Sea-pens ' and Renillas FIG. 709. Sea-fa

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Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 ALCYONARIA. 473 3. MADREPORARIA or coral - producing polyps with a definite number of tentacles—in most cases in multiples of six (appar- ently only four in the Cyatliopliylloid corals, all of which are fossil); as Madrepores, Porites, Astraeas, Maeandrinas, etc. SUB-SECTION II. THE ORDER OF ALCYONARIA OR SEA-PENS, SEA-FANF ETC. THE Alcyonarians are polyps which have eight long- fringed tentacles around a narrow disk, and which form communities by budding. The ' Sea-pens ' and Renillas FIG. 709. Sea-fan, Gorgonia Jlabellum.

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