The porifera and coelentera . Fio. 24. —Diajiraiii of 7i(/»»/iiniiitHlusoiils biiilded from a blastostjieAUiimii.) THE HYDROMEDUSAE 17 which its coeleiiteron originally communicated with that of thecolony from which it was budded. The radial canals are generally four in number, and are thenperradial ; but four interradial canals are also developed in somecases (Cladonema). Six are normally presented by Clavatella( = Eleutheria). In Lar ( = Willsia) six are also present, whichbifurcate twice; theie are thus twenty-four openings into thecircular canal. The generative cells (gonads) lie in the wa
The porifera and coelentera . Fio. 24. —Diajiraiii of 7i(/»»/iiniiitHlusoiils biiilded from a blastostjieAUiimii.) THE HYDROMEDUSAE 17 which its coeleiiteron originally communicated with that of thecolony from which it was budded. The radial canals are generally four in number, and are thenperradial ; but four interradial canals are also developed in somecases (Cladonema). Six are normally presented by Clavatella( = Eleutheria). In Lar ( = Willsia) six are also present, whichbifurcate twice; theie are thus twenty-four openings into thecircular canal. The generative cells (gonads) lie in the wall of the manubrium,between the ectoderm and the mesogloea, or in the ectoderm itself ;they rarely reach on to the subumbrella (Nemopsis). They are.
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectctenophora
