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V.—Note on the Horizon and Locality of Sowerby's Type-Specimen of Nautilus truncatus

Published online by Cambridge University Press:  01 May 2009

G. C. Crick
G. C. Crick
Affiliation:
British Museum (Natural History).
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Extract

Nautilus truncatus was described and figured by J. Sowerby in the “Mineral Conchology,” vol. ii, p. 49, pl. cxxiii, April, 1816, his description and remarks being as follows:—

“Spec. char. Thick, flatted, plain, umbilicate ; back flat, mouth elongated, four-angled : siphuncle nearest to the inner margin of the septum.

Type
Original Articles
Information
Geological Magazine , Volume 7 , Issue 11 , November 1900 , pp. 514 - 515
Copyright
Copyright © Cambridge University Press 1900

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References

page 514 note 1 Usually called ‘air-chambers.’

page 514 note 2 The specimen figured by Lister evidently had an open umbilicus, and, judging by the figure, it was, I believe, from the Calcareous grit, and is referable to Sowerby's, J. de C. Nautilus hexagonus (Min. Conch., vol. vi, 1826, p. 55, pl. dxxix, fig. 2).Google Scholar

page 515 note 1 This pit was known to the writer as the “Midland Railway Pit” ; it was on the south-western side of the town, on the small piece of ground on the western side of, and adjoining, the main line of the Midland Railway, and between the Kempston Road and the river. I believe the stone was excavated for building a wall at the northern end of the Ampthill Tunnel.