. A manual of zoology. 54 MANUAL OF ZOOLOGY SECT. Dendrosoma (Fig. 20, g), one of the Tentaculifera : it has a creeping stem from which branches spring upwards, each terminating in a zooid with suctorial tentacles j and 'dkk>. Fig. 22.—Vorticella. A, B, living specimens in different positions; C, optical section; D1, D-, diagrams illustrating coiling of stalk; E1, E-, two stages in binary fission; E:!, free zooid; F1. F2, division into mega- and microzooids; G1, GJ, conjugation; H1, multiple fission of encysted form; H2, H;i, develop- ment of spores; , axial fibre; cart, cortex; cm, cut
. A manual of zoology. 54 MANUAL OF ZOOLOGY SECT. Dendrosoma (Fig. 20, g), one of the Tentaculifera : it has a creeping stem from which branches spring upwards, each terminating in a zooid with suctorial tentacles j and 'dkk>. Fig. 22.—Vorticella. A, B, living specimens in different positions; C, optical section; D1, D-, diagrams illustrating coiling of stalk; E1, E-, two stages in binary fission; E:!, free zooid; F1. F2, division into mega- and microzooids; G1, GJ, conjugation; H1, multiple fission of encysted form; H2, H;i, develop- ment of spores; , axial fibre; cart, cortex; cm, cuticle; c. vac, contractile vacuole; d, disc; gull, gullet; m, microzooid; mth, mouth; nu, meganucleus; per, peristome. (From Parker's Biology, partly after Saville Kent.). 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 Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan & Co. ,Ltd.
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