Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 740
round the body of the monad, which can retractitself into the bottom of it; and in the genus Salpingoeca bothcalyx and collar are present. In some forms of this group multi-plication seems to take place, not by fission, but by gemmation :and, as among hydroid polypes, the gemma! -may either… … Fig. 527.—Single zoijid of Codosiga umbellata : cl,collar; n, nucleus; cv, double contractile vesicle. 1 See his memoirs in Ann. Xat. Hist. ser. 3, vol. xviii. 18(JG; ibid. ser. 4, vol. i.186S ; vol. vii. 1871; and vol. ix. 1872. 2 Seehis Manual of the Infusoria, 1880-82, 2 vols, and 1 vol. of…
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