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III.—On the Detection of Mural Pores in thin Sections of the Favositidæ

Published online by Cambridge University Press:  01 May 2009

H. Alleyne Nicholson
H. Alleyne Nicholson
Affiliation:
Regius Professor of Natural History in the University of Aberdeen.
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Extract

As a text for the following brief remarks on the recognition of mural pores in thin sections of the Favositoid Corals, I may quote a note appended by Mr. James Thomson, F.G.S., to a recent paper on the genus Lithostrotion (Trans. Edin. Geol. Soc. vol. v. part iii. p. 381). The note in question is subjoined, the quotation being verbatim, and, I may add, literatim also:—

“We may, however, attach an undue importance to microscopic examinations. Need I refer to the point raised recently by that erratic and energetic worker, Prof. Alleyne Nicholson, regarding mural pores in the genus Alveolites, the type of which is also in Dr. Fleming's collection. If he had detected mural pores in microscopic sections, we would have regarded such as being one of the greatest discoveries of modern times.

Type
Original Articles
Information
Geological Magazine , Volume 5 , Issue 3 , March 1888 , pp. 104 - 110
Copyright
Copyright © Cambridge University Press 1888

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References

page 105 note 1 By “the genus Chæceates hyperbolas” Mr. Thomson refers, I presume, “species” described by MrEtheridge, E., jun., and myself, under the name of Chætetes hyperboreus.Google Scholar

page 105 note 2 Mr. Thomson's disbelief in the possibility of recognising mural pores in thin sections of the Favositoid Corals is, it may be noted, of comparatively recent growth. Thus, in a paper published in the Proceedings of the Philosophical Society of Glasgow in 1881, Mr.Thomson, described and figured what he believed to be mural pores in thin sections of Chætetes Etheridgii, Thoms, sp. A reference to his figure (loc. cit. pi. i. fig. 7) will show, however, that in this case the supposed “mural pores” are represented in the centre of the calcite filling the visceral chambers of the corallites, and that they are really nothing more than minute granules of calcite.Google Scholar