V.—Note on the Identity of Nautilus Neocomiensis, Sharpe (non D'Orbigny) with Nautilus Deslongchampsianus, D'Orb

Extract

In 1853, in his “Description of the Fossil Eemains of Mollusca found in the Chalk of England” (Mon. Pal. Soc.), Sharpe described and figured a specimen under the name of Nautilus Neocomiensis, d'Orbigny. He states (loc. cit. p. 15), “We have only seen one small specimen from the Grey Chalk, which we can refer to this species; it is from Urchfont near Devizes, in the Collection of Mr. Cunnington, and is 2 inches in its greatest diameter and 1¼ inch in breadth; although a good deal broken, it shows all the peculiar characters of the species. The species is more common in the Lower Greensand of Dorking, Atherfield, Sandgate, etc., where it sometimes reaches above 7 inches in diameter. M. d'Orbigny quotes it as common in the lower beds of the Middle Division of the Neocomian Formation in France.”