The shell, however, more immediately under our consideration, the variety, delineated at figure 3, is from another source; it was among the spoils of rarities sent over to this country from Holland, at the time of the insurrection connected with the first inroads of the French into that country. The shell passed into the hands of a merchant of curiosities in London, and being afterwards sold, its destination is uncertain; the price affixed was twenty guineas. This shell corresponded very nearly with the variety denominated Seba’s Cedo nulli, having once formed a part of the museum of the celebrated Seba, but it could not be the same, because the entire collection of Seba, which at the period of the French invasion constituted part of the Royal Museum of the Stadtholder, was carried into France and its contents distributed among the other objects of natural history in the French Museum[2]. The description which Favanne has left us of the CEDO NULLI DE SEBA is in the following words, and will be found on a near comparison to accord pretty accurately with our present shell:—“_Le Cedo nulli_ de Seba, à large bande citron foncé, chargée de quatre cordelettes de grains inégaux, blancs, bleus, rouges et orangés. Le reste de sa robe est fascié et marbré d’orangé-brun, de jaune, de rouge et bleu-pâle sur un fond blanc avec deux bandes grenues vers le bas.” FAVANNE, t. ii. p. 422. FIGURE IV. CONUS AMMIRALIS var CEDO NULLI β. FULVOUS NONPAREIL CONE. Spire high and tapering, fulvous reddish and orange, varied and marbled with white; two orange bands, each with four belts of white dots, and a single series near the tip. * * * * * The shell from which this drawing is taken fell also into the possession of the same individual as the last, and much about same period. This rarity was disposed of, as I have been informed, at a price exceeding that of the former, and passed shortly after, I believe, into the Imperial cabinet, at Vienna, or otherwise into one of the continental cabinets in the north of Europe, a circumstance we have not, at this distant period, any means whatever of determining.