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I.—On ‘Pyrgoma cretacea,’ a Cirripede, from the Upper Chalk of Norwich and Margate

Published online by Cambridge University Press:  01 May 2009

Henry Woodward
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Extract

In the year 1865 I noticed the occurrence of what appeared to be a sessile Cirripede from the Upper Chalk of Norwich, and referred it to Leach's genus Pyrgoma. For this unique example the name of Pyrgoma cretacea was then proposed, and afterwards, in 1868, it was more fully described and figured by me in the GeologicalMagazine. I also pointed out that Charles Darwin, in his Monograph on the Fossil Cirrepedia, had described a fossil form belonging to this genus under the name of Pyrgoma anglicum, from the Coralline Crag of Ramsholt, Suffolk, a species found living off the south coast of England and of Ireland, Sicily, Madeira, Cape de Verde Islands, etc.; while Michelotti had named, but not described, a species (Pyrgoma undata) from the North Italian Tertiary strata.

Type
Original Articles
Information
Geological Magazine , Volume 8 , Issue 4 , April 1901 , pp. 145 - 152
Copyright
Copyright © Cambridge University Press 1901

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References

page 145 note 1 Brit. Assoc. Birmingham (1865), Reports, p. 321Google Scholar.

page 145 note 2 Geol. Mag., Dec. I, Vol. V (1868), pp. 258–9, Pl. XIV, Figs. 1, 2Google Scholar.

page 145 note 3 “The Fossil Balanidæ and Verrucidæ”: Pal. Soc., 1854, p. 36, tab. ii, fig. 7Google Scholar.

page 145 note 4 Bosquet, J.: “Mon. Crustacés foss. terr. Crét. Duché de Lim bourg,” p. 14, figs. 1–7Google Scholar. Darwin makes a distinct family for this genus—the Verrucidæ.

page 145 note 5 Mon. Pal. Soc., 1854, p. 43, tab. ii, fig. 10Google Scholar.

page 146 note 1 A Monograph of the Subclass Cirripedia, etc.: The Balanidæ and Verrucidæ, p. 355. Ray Society, 1854Google Scholar.

page 148 note 1 A Monograph of the Subclass Cirripedia: The Balanidæ, etc., pp. 485–7, pl. xx, fig. 4. Ray Society, 1854Google Scholar.

page 150 note 1 That is, 54 plates on the side figured: if perfect, there would have been an equal number on the other side, or about 108 in all.