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V.—Woodwardian Museum Notes. On Two Abnormal Cretaceous Echinoids
Published online by Cambridge University Press: 01 May 2009
Extract
In 1887 a quadri-radiate Echinoconus (Galerites) subrotundus from the Lower Chalk of Shudy Camps, Cambridgeshire, was presented to the Woodwardian Museum by J. Carter, Esq., F.G.S. The specimen is in a good state of preservation, but it has been subjected to a slight amount of crushing, and this has caused (1) the apex of the test to be pushed backwards to a very small extent, and (2) an abrasion of the antero-lateral border. It has the subconoidal form of the normal examples of this species, but is subquadrate in section, and this is due to the fact that only four ambulacral and four interambulacral areas are present, the fifth area of both kinds being completely wanting.
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References
page 117 note 1 Nova Acta Physico-Medica Leop. Car. Acad. 18. 1 (1836), Tab. xiii. figs 7.Google Scholar
page 117 note 2 Ibid. p. 287, Tab. xiii. figs. 1–5.
page 117 note 3 Journ. Lin. Soc. (Zoology), vol. xv. (1881), p. 126,Google Scholar pl. v. figs. 1–3.
page 117 note 4 Arch. für Naturges. iii. (1837) p. 241,Google Scholar pl. v.
page 117 note 5 Ibid. p. 242 and loc. cit. p. 127.Google Scholar
page 117 note 6 Q.J.G.S. vol. xlv. p. 149.Google Scholar
page 119 note 1 Cret Echin. pl. xxx. fig. 2.
page 119 note 2 Ibid. p. 151.
page 119 note 3 I am indebted to Mr. Gregory of the British Museum of Natural History for this information.