A manual of the Infusoria : including a description of all known flagellate, ciliate, and tentaculiferous protozoa, British and foreign, and an account of the organization and the affinities of the sponges . ubt that during such transient larval existence the young Echinodermresembles in a truly remarkable manner such Peritrichous Ciliate Infusoria as Urocen-trutn turbo,V\. XXXIII. Figs. 7-9, and Didinium nasutum, PI. XXXII. Figs. 50-57,and woodcut. Fig. 10, the latter type more especially being characterized in its normal Recherches sur Iembryologie des Bryozoaires, 1877. CLASS II. CI LI ATA.
A manual of the Infusoria : including a description of all known flagellate, ciliate, and tentaculiferous protozoa, British and foreign, and an account of the organization and the affinities of the sponges . ubt that during such transient larval existence the young Echinodermresembles in a truly remarkable manner such Peritrichous Ciliate Infusoria as Urocen-trutn turbo,V\. XXXIII. Figs. 7-9, and Didinium nasutum, PI. XXXII. Figs. 50-57,and woodcut. Fig. 10, the latter type more especially being characterized in its normal Recherches sur Iembryologie des Bryozoaires, 1877. CLASS II. CI LI ATA. 477 condition by the possession of two, and, preceding the act of fission, four, ciliary approximate estimate of this resemblance may be gained by a comparison of thefigures just cited with the accompanying woodcut illustration, Fig. 9, of the earhestlarval or Echinoptedium phase of a Feather-star, Comatula, reproduced fromHaeckels Naturliche Schopfungs-Geschichte. The Echinus, the Star-fish, or theHolothurian, one and all, present an identical or but slightly modified initial stmcture,and may therefore be consistently regarded as the descendants of a similar simplePeritrichous The figures, bracketed in pairs, represent six larval Metazoa, with their respective Infusorial isomorphs, as cor-related in the accompanying text. Fig. I, an Astoraatous larval Co^Ienterate or Plamila ; Fig. 2, an Astomatous Holotrichous Infusorium, Opalina ;Fig. 3, a larval Aproctous Turbellarian ; Fig. 4. a Stomatode Holotrichous Infusorium, Paramtecium; Fig. 5, a larvalNemertian, Cefhalothrix, after Macintosh; Fig. 6, a CiUo-Flagellate Infusorium, Melodinium; Fig. 7, a Telotro-chous Annelid larva, after Gegenbaur; Fig. 8, a Peritrichous Infusorium, Telotrochidium; Fig. 9, a MesotrochousEchinoderm larva, after Haeckel; Fig. 10, a Peritrichous Infusorium, Didinium (prior to subdivision) ; Fig. 11, atypical larval Polyzoon, after Barrois ; Fig. 12, a Peritrichous Infusorium, Vort
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Keywords: ., bookauthorkentwsavillewilliamsa, bookcentury1800, bookdecade1880
