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II.—On Necrozius Bowerbankii, a new Genus of Canceridæ from the London Clay1
Published online by Cambridge University Press: 01 May 2009
Extract
On the genus Necrosius.—This new genus is very near to Ozius, and is still more near to a small genus, established a few years since by M. Stimpson, named Spherozius. Like this last-named form, the carapace of Necrozius is remarkable for its globular form, its width scarcely surpassing its length. The curve of the buckler is slight in a transverse direction, but is great from back to front, the anterior border being much curved down. The latero-anterior borders are continuous, almost without interruption, with the latero-posterior, which latter are swollen. The frontal border (rostrum) projects a little, and is slightly depressed in the centre. The basal joint of the internal antennæ is large, and it is articulated obliquely beneath the front (rostrum). The basal joint of the external antennæ is short, not reaching to the front as in the Pseudozius of Dana, and in spherozius of Stimpson; the articulation is free and is not lodged in the internal obital cavity. With Ozius on the contrary, this basal joint is fully attached to the front.
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Footnotes
1
Translated from the ”Histoire des Crustacés Podophthalmaires Fossiles,” par Alphonse Milne-Edwards: (Reprinted from the Annales des science Naturelle. Tom xviii., 4te series, pp. 297). Paris, 1865.
References
page 532 note 1 [The specimen here referred to, and which is figured in our plate (Plate XXI. figs. 2 and 3), was obtained some years since by Dr. J. S. Bowerbank, F.R.S., from the London Clay, Holloway, when the Great Northern Railway was in course of construction. Two less perfect specimens have, however, since been obtained from Sheppey.—H.W.]
page 532 note 2 [The type-specimen here figured is now is the British Museum.—H. W.]