This superb shell, admitted to be the finest example of its kind, at present known, once constituted part of the Conchological Collection of Sir Ashton Lever; and continued to be a distinguished ornament of that Museum after it passed into the hands of Mr. Parkinson. At the dissolution of that Museum, which took place in the month of May, June, and the beginning of July, in the year 1806, the specimen became the property of a very celebrated amateur, the late Mr. Jennings: he purchased it at the sale for the sum of seven pounds.[6] Mr. Jennings is since dead, and his collection being, like the former, dispersed by public sale: we are no longer certain in whose possession this very beautiful rarity now remains. Besides that this shell excels in magnitude every other known example of its kind, the formation of the shell itself is extremely fine, its perfection exquisite, the colouring of the richest and most decided hues, and the marks and lines throughout, which so eminently characterize the shell, definitely distinct; we shall dwell no further on the peculiar beauty of this shell, from a persuasion that the drawing will be found so explicit and so satisfactory, as to render a minute description needless: it was taken with peculiar care, by permission of its proprietor, while it remained in the Leverian Museum, and will not, we are convinced, be found defective in point of accuracy, upon the most attentive comparison with the original, should that ever be produced in competition with it. In the Linnæan arrangement of Conchology, the shells of this kind constitute a species of the Genus Buccinum, the Buccinum Harpa of that author. Previous to the time of Linnæus, the best Conchologists had considered those particular shells that possess the essential characters of the Common Harp Shell, as a distinct genus. Rumpfius so adopts it under the name of Harpa; and Argenville subsequently regarding that particular kind called Buccinum Harpa, by Linnæus, as the type of the genus, denominates it, by way of eminence, Harpa Nobilis. By some inconceivable error it has been asserted that Lamarck was the first author who separated the family of Harps from the genus Buccinum; this is evidently a mistake, as we perceive from Rumpfius and Argenville, and as we are now proceeding to shew from the “_Catalogue Systématique et Raisonné_,” of the once celebrated cabinet of M. de Davilla; besides which, some others might be added, were it material to notice them.