The porifera and coelentera . Fio. iSb.—Stephalia corona, a young colony. (After Uaockel.). Fio. 4(^i:—Strphali(( cnromi, roloiiy in section. (After Ilaickel.) nn, iiioutli of tin- i«iiiii:iryvaslrozooid, tlio cavity of wliich is with llie iixial canal (rn) and tlie canal [dcxiis(lie) of the colony. Tlio larpi i)niMiniatidiorr> (j>) is siirroundod by a rinj; of ncctophores (h),from anion); which projucts thliore ; {>), aocondary gastrozooidswith (<) tentaclfj). THE HYDROMEDUSAE 45 are attached side by side, leaving an incomplete hydroecium betweenthem (Praya); or the
The porifera and coelentera . Fio. iSb.—Stephalia corona, a young colony. (After Uaockel.). Fio. 4(^i:—Strphali(( cnromi, roloiiy in section. (After Ilaickel.) nn, iiioutli of tin- i«iiiii:iryvaslrozooid, tlio cavity of wliich is with llie iixial canal (rn) and tlie canal [dcxiis(lie) of the colony. Tlio larpi i)niMiniatidiorr> (j>) is siirroundod by a rinj; of ncctophores (h),from anion); which projucts thliore ; {>), aocondary gastrozooidswith (<) tentaclfj). THE HYDROMEDUSAE 45 are attached side by side, leaving an incomplete hydroecium betweenthem (Praya); or the hydroecium is altogether absent (Galeolaria).It serves essentially as a protective canal, into Avhich the coenosarcmay be withdxawn. The coenosarc is extremely long, tubular, andcontractile ; its endoderm is continued upwards beyond the hydroe-cium as the blind somatocijst (acrocyst), the upper end of whichusually secretes an oil globule, pres
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectctenophora
