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The Nomenclature of Some Lower Chalk Ammonites

Published online by Cambridge University Press:  01 May 2009

L. F. Spath
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Extract

One of the most widely quoted but least common Chalk ammonites is Ammonites navicularis Mantell, which has been the subject of a very careful paper by the late G. C. Crick. Judging by the literature, however, this species is still generally misunderstood, and inquiries from correspondents are partly responsible for the present note. There is no doubt that widely different forms have been included in A. navicularis, from Sowerby's time (1827) down to the present (e.g. Collignon, 1931), and I have on previous occasions separated, with new names certain forms wrongly attributed to this species by Sharpe (1857), Guéranger (1867), and de Grossouvre (1912). But although a good deal remains to be done, without figuring typical specimens and without having material for comparison from India, Portugal, and Madagascar, it is not advisable to express opinions on the ammonites figured as A. navicularis by yet other authors, e.g. Stoliczka (1865), Choffat (1898), or Boule Lemoine, and Thévenin (1907).

Type
Original Articles
Information
Geological Magazine , Volume 74 , Issue 6 , June 1937 , pp. 277 - 281
Copyright
Copyright © Cambridge University Press 1937

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References

page 277 note 1 “On Ammonites navicularis Mantell”, Proc. Malac. Soc., xiii, 1919, 154.Google Scholar

page 278 note 1 “On New Ammonites from the English Chalk,” GEOL. MAG., LXIII, 1926, 82. Also “On the Zones of the Cenomanian and the Uppermost Albian,” Proc. Geol. Assoc., xxxvii, 1926, 431.Google Scholar

page 278 note 2 “On Cretaceous Cephalopoda from Zululand,” Ann. S. Afr. Mus., xii, pt. vii, 1921, 315.Google Scholar

page 278 note 3 Mineral Conchology, vi, 1827, 105, pl. 555, fig. 2.Google Scholar

page 278 note 4 Pal. Franqaise, Terr. Crét., i, 1841, 340, pi. ciii only (badly restored).Google Scholar

page 278 note 5 “Pseudoceratites of the Cretaceous,” Mon. U.S. Geol. Surv., xliv, 1913, 113.Google Scholar

page 279 note 1 Yorkshire Type Ammonites, ii, 1918, xii, xiii.Google Scholar

page 279 note 2 Spath, , “On the Ammonite Horizons of the Gault and Contiguous Deposits,” Summary of Progress, Geol. Surv., 1922 (1923). 144.Google Scholar

page 280 note 1 Spath, , “On Upper Albian Ammonoidea from Portuguese East Africa, etc.,” Ann. Transvaal Mus., xi, pt. 3, 1925, 197.Google Scholar

page 280 note 2 Spath, , “Ammonoidea of the Gault,” Monogr. Palaeont. Soc., pt.viii, 1931, 328.Google Scholar

page 280 note 3 Loc. cit. (Ann. Transvaal Mus.), 1925, 197.Google Scholar

page 281 note 1 “Le Crétacé de la Loire-Inférieure et de la Vendée,” Bull. Soc. Sci. Nat. Quest France (3), ii, 1912, 28.Google Scholar