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IV.—The Reptant Eleid Polyzoa

Published online by Cambridge University Press:  01 May 2009

W. D. Lang
W. D. Lang
Affiliation:
British Museum (Natural History)
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Extract

The Eleidæ are a very natural family of extinct Polyzoa, remarkable for exhibiting characters relative to both the groups Cyclostomata and Clieilostoraata. It is not, however, the affinities of this with other families that are here considered, but a means of determining by zoæcial characters the reptant ‘ species’ within the group; the validity of the ‘genera’ forming it; the occurrence in England of one of the ‘genera’—Semimultelea— hitherto unrecorded from Britain; the description of a new species of this ‘ genus’; and the phenomenon of local groups of zoæcia having characters differing from those of the rest of the zoarium.

Information

Type
Original Articles
Information
Geological Magazine , Volume 3 , Issue 2 , February 1906, pp. 60 - 69
Copyright
Copyright © Cambridge University Press 1906

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References

page 60 note 1 Gregory, J. W.: British Museum Catalogue of Cretaceous Bryozoa, vol. i (1899).Google Scholar

page 60 note 2 See also for a small table of this kind, Gregory, British Museum Catalogue of Jurassic Bryozoa, 1896, p. 29.

page 61 note 1 Lang, W. D.: “Jurassic Forms of the ‘genera’ Stomatopora and Proboscina,” Geol. Mag., 1904, p. 318;Google Scholar and “Stomatopora antiqua, Haime, and its related Liassio Forms,” Geol. Mag., 1905, p. 258.Google Scholar

page 63 note 1 Hagenow, Von, 1846: Geinitz, “Gruudriss der Versteinerungs kunde,” pl. xxiii b, fig. 7.Google Scholar

page 63 note 2 D'Orbigny, , 1853–1854: Paléontologie Française, Terrains Crétacés, vol. v, pl. 787, figs. 17–20.Google Scholar

page 63 note 3 D'Orbigny: loc. cit., pl. 788, fig. 3.

page 64 note 1 After Frederic Dixon, author of “The Geology of Sussex.” Dixon's collection, acquired by the British Museum in 1850, contains many type-specimens of Chalk Polyzoa.

page 65 note 1 Dibley, G. E., “Zonal Features of the Chalk Pits”: Geol. Assoc. Proc., vol. xvi, pt. 9 (1900), pp. 490–491.Google Scholar

page 65 note 2 Young, G. W., “The Chalk Area of North-East Surrey”: Geol. Assoc. Proc. (1905), p. 206.Google Scholar

page 65 note 3 Gregory, J. W.: British Museum Catalogue of Jurassic Polyzoa, 1896, pp. 14–22.Google Scholar

page 65 note 4 Cumings' term for the ontogeny of a colony. See Cumings, E. R., “ Development of Fenestella”: Amer. Journ. Sci., vol. xx (1905), footnote to p. 169.Google Scholar In a colonial organism like a Polyzoan, three developments have to be considered: (1) ontogeny, the development of the individual; (2) astogeny, the development of the colony; (3) phylogeny, the development of the race.

page 66 note 1 δ τόποζ, ‘the place,’ and ή μορφή ‘the form.’

page 66 note 2 Gregory, J. W.: British Museum Catalogue of Cretaceous Bryozoa, vol. i (1899), pp. 287–288Google Scholar, where references to other writings are given, of which that by Waters, A. W., “ Chilostomatous Characters in Melicertitidie” (Ann. Mag. Nat. Hist., ser. VI, vol. viii, 1891, pp. 48–53)CrossRefGoogle Scholar, should he read in this connection.

page 67 note 1 Gregory, J. W.: British Museum Catalogue of Cretaceous Bryozoa, vol. i (1899), p. 290.Google Scholar

page 67 note 2 British Museum Catalogue of Cretaceous Polyzoa, vol. i (1899), p. 50, text-fig. 1.Google Scholar

page 67 note 3 These terms are used with their botanical significance, as defined, for instance, by Asa Gray, “Structural Botany,” 1879, p. 95.Google Scholar

page 68 note 1 I.e. local recapitulations. See Jackson, R. T., “Localised Stages in Development”: Mem. Boston Soc. Nat. Hist., vol. v, No. 4 (1899), pp. 92, 139, 141.Google Scholar See also Lang, W. D., “Stomatopora antiqua, Haime”: Geol. Mag., 1905, pp. 259,260.Google Scholar