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III.—Note on the Genus Actinoceras, with Particular Reference to Specimens in the British Museum, showing the Perforated Apex of the Siphuncle

Published online by Cambridge University Press:  01 May 2009

Arthur H. Foord
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Extract

The genus Actinoceras was founded by Bronn in 1837, upon Dr. Bigsby's figures in the Transactions of the Geological Society; the chief distinguishing character being the possession of a large, dilated, and segmented siphuncle, filled with radiating deposits. The presence of a smaller internal tube with tubuli radiating therefrom and communicating with the septal chambers through the wall of the siphuncle. had not then been observed.

Type
Original Articles
Information
Geological Magazine , Volume 5 , Issue 11 , November 1888 , pp. 487 - 489
Copyright
Copyright © Cambridge University Press 1888

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References

page 487 note 1 Lethæa Geognostica, Zweite Aufl. Band i. p. 97.

page 487 note 2 Ser. 2, vol. i. 1824, p. 198, pi. xxv. figs. 1, 2 (excl. fig. 3).

page 488 note 1 Palæontology, 1860, p. 85.Google Scholar

page 488 note 1 See paper on this genus by the present writer in the Geological Magazine for December, 1887.