The porifera and coelentera . s I Fio. 19.—Portion of colony of UmdininviUea magnifled.(From LnV)bock, after .\Uiimn.) (Podocorync), or the tentacles may be reduced to mere knobs(Hydractinia, Fig. 22, /) or absent (Eudendriuni). The mouth isvery small or absent. There seems to be no reason to deny thename blastostyle to the elongated tubes which spring from thehydroid of Tubularia, each of which buds numerous medusoids(Fig. 24, /). The blastostyle may spring from the hydrorhiza(Podocoryne), from the hydrocaulus (most Eudendrium), or fromthe hydroid (Tul)ularia). A false hiastosti/le (Allmaii,

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The porifera and coelentera . s I Fio. 19.—Portion of colony of UmdininviUea magnifled.(From LnV)bock, after .\Uiimn.) (Podocorync), or the tentacles may be reduced to mere knobs(Hydractinia, Fig. 22, /) or absent (Eudendriuni). The mouth isvery small or absent. There seems to be no reason to deny thename blastostyle to the elongated tubes which spring from thehydroid of Tubularia, each of which buds numerous medusoids(Fig. 24, /). The blastostyle may spring from the hydrorhiza(Podocoryne), from the hydrocaulus (most Eudendrium), or fromthe hydroid (Tul)ularia). A false hiastosti/le (Allmaii, 1 ; Weismann, 10) is formed by the THE HYDROMEDUSAE. Fio. 20.

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