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On a New Ammonite Genus (Dayiceras) from the Lias of Charmouth

Published online by Cambridge University Press:  01 May 2009

L. F. Spath
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Extract

THE following account is based on the six specimens recorded by Dr. W. D Lang in his paper on “The Ibex-zone at Charmouth, and its relation to the Zones near it” After mentioning the occurrence, in the top of the zone, of an apparently new Polymorphitid, Dr. Lang added the following footnote: “A striking form, 3 to 4 inches in diameter, with numerous, very thin costæ. Two specimens were found (not in place) in the winter, 1915–16, by Lieut. Dan Haggard, who presented them to the British Museum. The author found parts of three specimens in place in the Pyritic Marls in June, 1916. A sixth specimen, the best preserved of all, has been in the British Museum many years, and is labelled ‘Said to be from Lyme Regis’.”

Type
Original Articles
Information
Geological Magazine , Volume 57 , Issue 12 , December 1920 , pp. 538 - 543
Copyright
Copyright © Cambridge University Press 1920

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References

page 538 note 1 Reed, F. R. C., “The Lower Palæoz. Trilobites of the Girvan district”: Mon. Palæont. Soc., 1903–6, pp. 146–7.Google Scholar

page 538 note 2 Also ibid., pl. xix, fig. 2.

page 538 note 3 Woodward, H., Geol. Mag., 1880, pp. 97–9.CrossRefGoogle Scholar

page 538 note 4 Dollo, L., “La Paléontologie Ethnologique”: Bull. Soc. belge de Géol. Mem., Bruxelles, Tome xxiii, 1909, pp. 406–17.Google Scholar See also Swinnerton, H. H., Geol. Mag., Vol. LVI, 1919, pp. 108–9.Google Scholar

page 538 note 5 Proc. Geol. Assoc., vol. xxviii, pt.i, 1917, p.32. A seventh example was found by Dr. Lang in May, 1920.Google Scholar

page 541 note 1 N. Jahrb. f. Min., etc., 1887. pl. v, fig. lb.Google Scholar

page 542 note 1 Dedicated to Dr. W. D. Lang in recognition of his his prolonged and painstaking investigations of the Liassic succession at Charmouth.Google Scholar

page 542 note 2 The writer considers that A. vernosæ Zittel, probably a Toarcian form, does not belong to Uptonia.Google Scholar

page 542 note 3 Confined, in the writer's opinion, to the jamesnoi and ibex zones, and not including e.g. the Domerian Bouleiceras and later Hildoceratids.Google Scholar