Elementary text-book of zoology, general part and special part: protozoa to insecta . elementarytextbo00clau Year: 1892 Fio. 168.—Group of uomatocysts at tli/j end of the tentacle of a Scyphid ma 'X^KHEniJ- i-. ^ Stl which they stand Fig 1G9 —Longitudinal section tliiou;?li the uervo ring of Charybdea. i n connection '^~' ^®^®® ^^^^^ ^^ ^^° ectoderm; Gz, ganglion cells ; Nf, nerve fibres ; Stl, supporting lamella; E, entodenn cells. through pro- cesses of the sense cells. Amongst many Medusfe (Crasjyedota and Charybdea) we find a single or double nerve ring near the edge of the disc, while
Elementary text-book of zoology, general part and special part: protozoa to insecta . elementarytextbo00clau Year: 1892 Fio. 168.—Group of uomatocysts at tli/j end of the tentacle of a Scyphid ma 'X^KHEniJ- i-. ^ Stl which they stand Fig 1G9 —Longitudinal section tliiou;?li the uervo ring of Charybdea. i n connection '^~' ^®^®® ^^^^^ ^^ ^^° ectoderm; Gz, ganglion cells ; Nf, nerve fibres ; Stl, supporting lamella; E, entodenn cells. through pro- cesses of the sense cells. Amongst many Medusfe (Crasjyedota and Charybdea) we find a single or double nerve ring near the edge of the disc, while in the Polyps (Actinia), the nerve fibres have a more irregular distribution (fig. 169). CLASS I.—ANTHOZOA*=ACTINOZOA (_Comlpolyps). Polyps loith cesophageal tube and mesenteric folds, with internal generative organs {no medusoid sexual generation), usually with solid mesodermal calcareous skeleton. The polyps of the Actinozoa are distinguished from the polyps * Ehrenberg, ' Beitrage zur pbysiologischen Kenntniss der Korallenthiere im Allgemeinen unci besonders des rothen Meeres.' Ehrenberg. ' Uber die Natiir und Bildung der Korallenbanke,' vl 5A. der Berl. Akad, 1832. Ch. Darwin,
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