Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-25T07:35:38.791Z Has data issue: false hasContentIssue false
  • English
  • Français

III.—On a large Cirripede belonging to the genus Loricula, from the Middle Chalk (Turonian), Cuxton, near Rochester, Kent

Published online by Cambridge University Press:  01 May 2009

Henry Woodward
Get access Rights & Permissions [Opens in a new window]

Extract

More than sixty years ago Mr. G. B. Sowerby, jun., described and figured a unique specimen of a remarkable fossil Cirripede from the Chalk of Kent which he named Loricula pulchella. It was obtained by Mr. N. T. Wetherell, F.G.S., of Highgate, and was subsequently acquired with that gentleman's collection by the British Museum (Natural History). Mr. Wetherell's Loricula was again described and figured by Charles Darwin in his “Monograph on the Fossil Lepadidæ or Pedunculated Cirripedes of Great Britain.”

Type
Original Articles
Information
Geological Magazine , Volume 5 , Issue 11 , November 1908 , pp. 491 - 499
Copyright
Copyright © Cambridge University Press 1908

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

page 491 note 1 Sowerby, G. B. jun.: Ann. Nat. Hist., 1843, vol. xii, p. 260.Google Scholar

page 492 note 1 Darwin, Charles, Fossil Lepadidæ, 1851, pp. 81–6, Tab. v, figs. 1–4: Mon. Pal. Soc., 1851, vol. v.Google Scholar

page 492 note 2 von Zittel, K. A., “Loricula lœvissima, Zittel, Ob. Kreide, Dülmen, Westfalea”: Sitz. der Math.-phys. Classe vom 8 Novr., 1884, pp. 586Google Scholar, 587, fig. 4, Loricula lœvissima. “Loricula Syriaca, Dames, Cenomanian”: op. cit., p. 589, fig. 5.

page 492 note 3 Dames, W., “Ueber eine Art Cirripeden Gattung Loricula aus den Kreideablagerungen des Libanon (L. Syriaca)”: Berlin Naturf. Freunde Sitzber., 1878, pp. 70—4.Google Scholar

page 492 note 4 DrFritsch, Anton and Kafka, Jos: ”Die Crustaceen der Böhmischen Kreideformation Prag,” 1887, pp. 1–3, Taf. i, 4to.Google Scholar

page 494 note 1 In his monograph on the Fossil Lepadidæ (Pal. Soc., 1851) Darwin writes, p. 85: “In the imaginary restored figure [Tab. v, fig. 4, op. cit.] the tergum has its normal shape and manner of growth. The first latus now answers to the upper latus in Scalpellum, but it is interposed to a quite unprecedented extent between the scutum and tergum [see Fig. 2, l']; the second latus [see Fig. 2, l] is on this view the carinal latus; and the rostral latus, always smaller than the carinal latus, and in Scalpellum quadratum and S. Peronii reduced to a very small size, is here quite aborted.”

page 494 note 2 l' is spoken of by Darwin also as the first latus; l is referred to by Darwin also as the second latus.

page 494 note 3 It seems not improbable that in Loricula the rostrum may have been aborted in this curious parasitic form.

page 495 note 1 The beautiful imbricated arrangement of the rows of transversely elongated calcareous plates, protecting the peduncle in Loricula, suggests at once comparison with the test of that anomalous Cretaceous Echinoderm Echinothuria floris, Woodward, S. P., described and figured in the Geologist for 1863, vol. vi, pp. 327–30, pl. xviiiCrossRefGoogle Scholar, in which the test of the Echinoid is rendered flexible by ten segments, or a double series of imbricating calcareous plates. See also Wyville Thomson's account of the living genus Calveria (Asthenosoma) hystrix, in “Depths of the Sea,” 1873, pp. 155–9, and Phil. Trans. Roy. Soc., 1874, vol. clxiv, pp. 730–7Google Scholar; and ProfessorGregory, J. W. on Echinothuridæ, etc., Quart. journ. Geol. Soc., 1897, vol. liii, pp. 112–22.CrossRefGoogle Scholar

page 498 note 1 “Monographie des Cirrhipèdes ou Thécostracés,” par Gruvel, A., Université de Bordeaux. Roy. 8vo, pp. x + 472=482, avec 427 figures in text. Paris: Masson & Cie., 1905.Google Scholar

page 499 note 1 A comparison of Loricula Darwini (Fig. 1, supra, p. 493) with that of L. pulchella, var. minor (Fig. 2, p. 494) will emphasize the specific differences between the former and the latter. Fig. 2 agrees closely with Darwin's original figure of L. pulchella (Mon. Pal. Soc., 1851, T. 5), especially in the outline of the valves of the capitulum, and both differ markedly from the capitulum of L. Darwini, as drawn in our Fig. 1.