Upon this subject we have only lastly to observe that although Lamarck has deemed it requisite to give a specific character of this shell dissimilar from that of Dr. Leach, he omits to mention, as well as the former, that very conspicuous character of the species, the deep longitudinal hollow down the middle of the upper valve, and the dorsal elevation of the lower one. Lamarck, indeed, confesses that the individual which he had under his eyes, and consequently that which he describes, is not sufficiently perfect to authorize him in determining the analogy between that shell and the Anomia Capensis of Gmelin, which Chemnitz has figured; a circumstance that may explain the cause of this omission in the specific character of Terebratula sanguinea. Yet we should have thought a shell sufficiently entire to have enabled this ingenious Naturalist to have composed his character of the species, would have been so far perfect as to have justified some conclusion upon its analogy with the Gmelinian Anomia Capensis. We may confidently add that these two shells are totally distinct species, and are even generically different if we enter very scrupulously upon their distinctive characters. Dr. Solander had described this latter shell before the time of Gmelin under the name of Anomia Cruenta. The representations of this choice testaceous production, which accompanies our present description, will, it is presumed, convey a more correct idea of the shell than can be expressed by words. The Leverian specimen from which, as before observed, these figures are taken, realized at the public hammer at the Leverian sale the sum of five guineas,[27] and it still remains so rare that there would probably be little, if any, dimunition in the price were it again to be disposed of in the same manner at the present period. The shells of this kind vary in some small degree in the intensity of colour from a very deep sanguineous red to a paler hue. ----- Footnote 26: Many of these are found on our own coasts. _Vide Donovan’s British Shells_, in which the figures and descriptions of a number of the species of these genera occur. Footnote 27: Last Day’s Sale, lot 74, £5 5s. ------------------------------------------------------------------------ [Illustration: _35_ _London. Published by E. Donovan & Mess.^{rs} Simpkin & Marshall, March 1, 1823._ ] ------------------------------------------------------------------------ ENTOMOLOGY. PLATE XXXV. PAPILIO BELLADONNA BELLADONNA’S BUTTERFLY. LEPIDOPTERA. GENERIC CHARACTER. Antennæ thicker towards the tip, and generally terminating in a knob: wings erect when at rest. Fly by day. **** HELICONII.