. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LIFE CYCLE OF CORYMORPHA BIGELOWI 493 arranged cluster of oral tentacles, a single whorl of aboral tentacles with scattered (as opposed to annular) nematocyst batteries, an annular diaphragm, rooting filaments borne only in the lowermost part of the hydrocaulus, gonophores borne in clusters on pedicels (gonodendra), and well developed endodermal canals in the lower part of the hydrocaulus. Indeed, the parenchymous diaphragm and endo- dermal canals are considered to be characteristic of advanced and highly specialized members
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LIFE CYCLE OF CORYMORPHA BIGELOWI 493 arranged cluster of oral tentacles, a single whorl of aboral tentacles with scattered (as opposed to annular) nematocyst batteries, an annular diaphragm, rooting filaments borne only in the lowermost part of the hydrocaulus, gonophores borne in clusters on pedicels (gonodendra), and well developed endodermal canals in the lower part of the hydrocaulus. Indeed, the parenchymous diaphragm and endo- dermal canals are considered to be characteristic of advanced and highly specialized members of the genus (Kramp, 1949). However, the polyp of E. bigelozvi also shares certain features with Euphysa-type. polyps. The initially somewhat capitate oral tentacles of E. bigelozvi apparently do not become completely filiform in older polyps and are intermediate between Corymorpha and Euphysa in this regard. The curious mode of asexual reproduction by frustulation (Fig. Id) has been reported in Euphysa (Miles, 1937) but not in Corymorpha (Kramp, 1949). The perisarc of E. bigelozvi is reminiscent of Euphysa both in its attachment to the upper region of the hydrocaulus and in its extension beyond the base of the hydro- caulus. We do not know the extent to which peculiar environmental factors of our culture conditions may have influenced the expression of these characteristics, or the degree of phenotypic plasticity in this species. Modes of budding in hydro- d. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
