. The microscope and its revelations. issiondoes not extend througl ithe pedicel, and thetwin bodies being thusheld together at theirbases, and themsehv-undergoing duplicativefission, clusters are pro-duced which springfrom common pedicels(fig. 5H6) : and bythe extension of thedivision down thepedicels themselves,composite arborescentfabrics, like those ofzoophytes, are pro-duced. In another group a structureless and very transparent hornycalyx, closely resembling in miiiiatiire the polype-cell of a Gampanu-Ifiria, forms itself round the body of the monad, which can retractitself into the bott
. The microscope and its revelations. issiondoes not extend througl ithe pedicel, and thetwin bodies being thusheld together at theirbases, and themsehv-undergoing duplicativefission, clusters are pro-duced which springfrom common pedicels(fig. 5H6) : and bythe extension of thedivision down thepedicels themselves,composite arborescentfabrics, like those ofzoophytes, are pro-duced. In another group a structureless and very transparent hornycalyx, closely resembling in miiiiatiire the polype-cell of a Gampanu-Ifiria, forms itself round the body of the monad, which can retractitself into the bottom of it; and in the genus Salpingceca bothcalyx and collar are present. In some forms of this group imilti-plication seems to take place, not by fission, but by gemmation;.-Hid, as among hvdroid polypes, the i/iiitnni- may either detachthemselves and live independently, or may remain in connectionwith their parent stocks, forming composite fabrics, in some of whichthe calyces follow one another in linear series, while in others they. cr FIG. 585.—Single zocollar ; ti. nucleus ; iidcv, >t Codosiga innbellata : rl,double contractile vesicle. 1 Sec bis memoirs in Ann. l. I/ixf. si-r. ••, vol. xviii. 18(50; op. cit, ser. 4, vol. ; vol. vii. 1S71; and vol. ix. 1s72. - Sec his Mninni! ,,/ fl/r Infusoria, issn-su, 2 vols. and 1 vol. of plates. FLAGELLATA 765 take on a ramifying arrangement. While some of these compositeorganisms are sedentary, others, as Diiiohri/oii. are free-swimming. Two solitary flagellate forms. Anthophysa axid Anisonema, inaybe specially noticed as presenting several interesting points ofresemblance to the peculiar type next to be described, the mostnoticeable being the presence of a distinct mouth and the possessionof two different motor organs—one a comparatively stout and stiffbristle, of uniform diameter throughout, which moves by occasionaljerks, and the other a very delirate tapering flagellum. which isin constant vibratory motion. If. a
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
