. Cassell's natural history. Animals; Animal behavior. iral 81Z-J: B, male colony, iiia^ni- Jted ; c, fi'iuaic bearing gonophores, magnitled. margin of the base, .spiral appendages, cylmdrica] very contractile and movable. They twist and untwist with great vivacity. The genus Podocoryne is not very unlike the last mentioned, but all the polypes teutaoulate. ., body). The buds which produce the medusse, or the generative part of the colony, are the Gonosome (Greek, gonos, offsi>ring). A^^len the Trophosome branches, or has offshoots, each one is a zooid, and the proper nutritive zooid,
. Cassell's natural history. Animals; Animal behavior. iral 81Z-J: B, male colony, iiia^ni- Jted ; c, fi'iuaic bearing gonophores, magnitled. margin of the base, .spiral appendages, cylmdrica] very contractile and movable. They twist and untwist with great vivacity. The genus Podocoryne is not very unlike the last mentioned, but all the polypes teutaoulate. ., body). The buds which produce the medusse, or the generative part of the colony, are the Gonosome (Greek, gonos, offsi>ring). A^^len the Trophosome branches, or has offshoots, each one is a zooid, and the proper nutritive zooid, which has a mouth and digestive cavity, is the hydranth (Greek, hyilra, hydra ; anthos, flower). The mouth is at the end of a cone, which is called the hypostome (Greek, hi/po, under ; stoma, mouth). The common basis of the Trophosome, by which the zooids are connected, is the hydrophyton (Greek, phiiton, a plant), and the end of the hydrophyton, or root, is the hydro- Thiza (Greek, rtiiza, a root). All the hydrophyton between the root and the hydranth is the hydrocaulus (Greek, kaulos, a stem). The bud, or zooid, which contains the reproductive elements, is a gonophore (Greek, ijonos, offspring ; plioreo, I bear). A planoblast (Greek, , wandering) is a generative bud, fit for a free locomotive life ; and a blastostyle (Greek, gtfilos, a column) is a columniform zooid, destined to give origin to generative buds. Umbrella is a terra for the gelatinous ball of a medusa : the manubrium is the part carrying the mouth ; and the velum (a veil) is a membranous l)erforated diaphragm, which stretches across the orifice of the umbrella which communicates with the external water. * Hudendrium Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Duncan, P. Martin (Peter Martin), 1821-1891; Metcalf Collectio
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecta, booksubjectanimals
