Geological Magazine (Decade III)
- Geological Magazine (Decade III) / Volume 6 / Issue 11 / November 1889, pp 494-498
- Copyright © Cambridge University Press 1889
- DOI: http://dx.doi.org/10.1017/S0016756800189538 (About DOI), Published online: 01 May 2009
Original Articles
VI.—On the Muscular Impressions of Cœlonautilus3 cariniferus J. de C. Sowerby, sp., compared with those of the Recent Nautilus
Arthur H. Foord and G. C. Crick
In examining the remarkably fine series of examples of Cœlonautilus cariniferus, mostly from the Carboniferous Limestone of Ireland, contained in the Geological Collections of the British Museum (Nat. Hist.), some were found to exhibit upon the cast of the body-chamber distinct marks of the shell-muscles. In one specimen (No. 50190) these are so perfect as to give a very clear outline of their form, and some of the test having been removed, their entire course can be made out.
Footnotes
3 This name from κο
λον hollow (referring to the umbilicus), and Nautilus, is proposed by one of us in substitution for Trematodiscus, Meek and Worthen, which was used by Häckel for a genus of Radiolarians. The name Trematoceras proposed by Hyatt (Proc. Boston Soc. Nat. Hist. 1883, vol. xxii. footnote, p. 291) in lieu of Trematodiscus is equally ineligible, because preoccupied, for although the species described by Eichwald (Leth. Rossica, 1860, vol. i. p. 1259)—Trematoceras discors—was a Bactrites, a generic name once publislied cannot be again employed, even for a different group, without risk of confusion.
