No CrossRef data available.
Published online by Cambridge University Press: 01 May 2009
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.
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.