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Different Explanations of the Bilateral Symmetry in the Rugose Corals

Published online by Cambridge University Press:  01 May 2009

N. N. Yakowlev
N. N. Yakowlev
Affiliation:
Leningrad.
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Extract

In the bilateral symmetry of the Rugose corals it is the general form of the polyparium, presenting a cone bent in the form of an oxen horn, that strikes at once the observer's eye and obliges him to seek for an explanation.

Type
Original Articles
Information
Geological Magazine , Volume 63 , Issue 6 , June 1926 , pp. 264 - 268
Copyright
Copyright © Cambridge University Press 1926

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References

page 266 note 1 Organization of Rugose corals and Origin of characteristic Peculiarities, Geological Magazine, 1917, p. 108.Google Scholar

page 267 note 1 Neus Jayrbuch, 1914, II Bd., 2 Heft, S. 333–4.Google Scholar

page 267 note 2 Zittel, , Grundzüge der Palœontologie, s. 96. I Abteilung. Invertebrata, 1921. See also Grundzüge der Palœontologie, 1924, s. 100.Google Scholar

page 267 note 3 This figure, certainly not corresponding with real facts, has been reprinted by Dacqué, Vergleichende biologische Formenkunde, s. 425.Google Scholar

page 267 note 4 Gerth, H., “Ueber die Entstehung des Septalapparates bei den palaeozischen Rugosen und bei lebenden Korallen”: Zeitschr. f. induktive Abstammungs u. Vererb. Lehre, 1919, Bd. xxi, Heft 4.Google Scholar

page 268 note 1 Gerth himself does not adduce photographs of such sections, while his schematic sketches (Palœontologie von Timor IX. Lief. Die Anthozoen der Dyas von Timor, s. 141, fig. 12) cannot prove the existence of the latter. If Gerth really possessed such sections, they possibly had been obtained from corals previously deformed in the rock.