. Handbook of zoology with examples from Canadian species, recent and fossil [microform]. Zoology; Invertebrates; Zoologie; Invertébrés. PROVINCE CiELENTERATA. 81 4 The following are the principal famihcs of Zoantharia : 1. AcTiNiAD-i;.—X(> Corallum. Polyps usually independent, attached l)y a broad base, but locomotive at will. Examples, Actinia, Khodacti'Ma, Mctridium. 2. ^i:.—\() Corallum. Polyps independent, with rounded or tajierin^ base. Examples. Ilyanthes, Cerianthes. n. ;,—Corallum spiculate. Polyps attached to a horizontal cccnosarc or common .,oft basis. Exa
. Handbook of zoology with examples from Canadian species, recent and fossil [microform]. Zoology; Invertebrates; Zoologie; Invertébrés. PROVINCE CiELENTERATA. 81 4 The following are the principal famihcs of Zoantharia : 1. AcTiNiAD-i;.—X(> Corallum. Polyps usually independent, attached l)y a broad base, but locomotive at will. Examples, Actinia, Khodacti'Ma, Mctridium. 2. ^i:.—\() Corallum. Polyps independent, with rounded or tajierin^ base. Examples. Ilyanthes, Cerianthes. n. ;,—Corallum spiculate. Polyps attached to a horizontal cccnosarc or common .,oft basis. Example, Zoantlies. 4. An :.—Corallum sclerobasic, havinfj Polyps with six tentacles. Example, Antipalhes. 5. FuN(;ii)/K.—Corallum iwlcareous, septiform. Individuals mostly distinct and large, with numerous tentacles. 6. —Septa numerous, cells attached, without coen* enchyma. 7. :.—Corallum reticulate, cell-walls not distinct from surrounding cicnenchyma. 8. ^:.—Cccnenchyma abundant, compact, calcareous. 9. —Corallum compact but porous, septa distinct. The animals of the five last families are mainly instrumental in the accumulation of the great coral reefs of the intertropical seas. Only a few small species of these coral-producing Anthozoa, are found in the Northern seas. Fig. 68, taken from Dana, shews the appearance of one of the tropical species of Astna when alive. *-*jfsrv"^. Fig. 68.—ASTREA PURPUREA, with polyps expanded—after Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Dawson, J. W. (John William), Sir, 1820-1899. Montreal : Dawson
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