The porifera and coelentera . cea in which a much elongated mother zooid forms the stem or axisof the colony, the daughter zooids being borne as lateral buds upon the colonies are erect, simple, or branched, or may be plumose. Whenthey are branched, secondary zooids, developed as buds from the stem ormotlier zooid, form the axes of tlie brandies, and tertiary zooids arebudded oft on each side of them. The secondary and tertiary zooids, though THE ANTHOZOA 29 they appear to be borne directly by the mother zooid, do not conmumicatedirectly with the cavity of the latter, but secondarily
The porifera and coelentera . cea in which a much elongated mother zooid forms the stem or axisof the colony, the daughter zooids being borne as lateral buds upon the colonies are erect, simple, or branched, or may be plumose. Whenthey are branched, secondary zooids, developed as buds from the stem ormotlier zooid, form the axes of tlie brandies, and tertiary zooids arebudded oft on each side of them. The secondary and tertiary zooids, though THE ANTHOZOA 29 they appear to be borne directly by the mother zooid, do not conmumicatedirectly with the cavity of the latter, but secondarily by means of solenia,which ramify in the greatly thickened mesogloea of the walls of themother zooid. The branch thus defined includes forms which havehitherto been classified with the Cornulariidae, and are, in truth, noteasily separable from that family. But they exhibit, in their mode ofbudding and in the disposition of the secondary zooids around a centralzooid, characters which nuirk them off distinctly from their nearest. Fig. XV. 1.—Portion of a colony of arhorea, Wri^ht ;imi1 StuiliT. About one-tliird natural size. 2.—Portion of stem of Telesto arborea. Magnitiid, showing; llio zooids. 3.—Extremity of branch of Coelogorgia. Ma^jniliiti, showins tlm zooids. 4.—Coelogorgia palmnxa, M. Edw. Portion of a colony about one-third natural size. 5.—Spicules of Coeicigorgia. (1 and 2 after Wright and Studer; 3 to 5 original.) Cornularian allies, and they appear to lead on to the well-defined groupof the Pennatulacea. Section 1. Asiphonacea. Characters—Colony erect, simple, or branch-ing, consisting of an elongated, axial zooid with thickened walls containingsolenia, from which secondary zooids are formed. Skeleton in the formof dentate discs or warty spindles ; a horny or calcified axis absent. Thecavity of the axial zooid is not divided by a partition. Family 1. Telestidae. From a membranous or ramifying stolonindividual Clavularia-like zooids, the body walls
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectctenophora
