The porifera and coelentera . Diagrams of the niedusoids of two species of Sarsia, tlie one budding niedusoids from themanubrium, the other from tlie ends of the railial canals. (After Allnian.) cylindrically arranged (Sarsia), or are broken up into four or eightbands. In Lar they are six in number, and lie on the walls of thesix-rayed gastiic cavity in the manubrium. The sexes are of the by Gemmation.—A medusoidof the type indicated above is either budded (a) from a hydroid(Syncoryne), or from a blastostyle (Tubularia), or from thehydrocaulus (Bougainvillea), or,
The porifera and coelentera . Diagrams of the niedusoids of two species of Sarsia, tlie one budding niedusoids from themanubrium, the other from tlie ends of the railial canals. (After Allnian.) cylindrically arranged (Sarsia), or are broken up into four or eightbands. In Lar they are six in number, and lie on the walls of thesix-rayed gastiic cavity in the manubrium. The sexes are of the by Gemmation.—A medusoidof the type indicated above is either budded (a) from a hydroid(Syncoryne), or from a blastostyle (Tubularia), or from thehydrocaulus (Bougainvillea), or, with the intermediation of ashort stem, from the hydrorhiza (most Perigonimus), or (//) from amedusoid (Sarsia), either from the manubrium (Fig. 25), orfrom the margin of the bell, at the end of the perradial canals(Codonium). Although in many cases niedusoids have not beentraced to hydroids, no medusoid of this group has been foundto develop directly from the ovum. THE HYDROMEDUSAE If, as seems probable, the product of the
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectctenophora
