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III.—A Contribution to the Study of the British Carboniferous Tubicolar Annelida

Published online by Cambridge University Press:  01 May 2009

R. Etheridge Jun.
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Extract

Sp. char.—Tube small, sinistral, narrow, increasing but little in size towards the aperture, very narrow and fine towards the apex; volutions not in the same plane, somewhat raised, with a sunken apex, rather deeply umbilicated on the attached side; section circular. Surface marked with faint, regular, equidistant, transverse ridges, which are more marked along the union of the whorls (or “suture”) than on the periphery or back of the last volution.

Type
Original Articles
Information
Geological Magazine , Volume 7 , Issue 7 , July 1880 , pp. 304 - 307
Copyright
Copyright © Cambridge University Press 1880

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References

page 304 note 1 M'Coy, Carb. Foss. Ireland, 1844, p. 169, t. 23, fig. 29.

page 305 note 1 Canad. Pal. Foss. i. p. 56.

page 305 note 2 P. 22, t. 2, f. 8.

page 305 note 3 Die Petrefactenkunde, etc., p. 96.

page 307 note 1 In specimens from other localities, however, the surface is quite as much Tinkled as in M'Coy's S. membranaceus.

page 307 note 2 Trans. Geol. Soc. Glasgow, iii. App. p. 23.Google Scholar