interval occasioned by this introduction of the Univalves we find Anomia,[26] and Placuna, two of his genera together, but with another tribe of beings, the animal inhabitants being of his class _Acéphales_; and after another wide interval in which the bivalve Mya,[26] the multivalve Pholas,[26] the univalve Teredo,[26] and the naked or shell-less Ascidia, occur we find in a distant class among another tribe of animals, _Mollusques Brachopodes_, the genus _Terebratula_. It is here ascribed to Bruguière, as in other works it is assigned to Lamarck. Such is the arrangement of this family in the _Règne Animal_ of Cuvier, a form in which no cabinet, it must be acknowledged, could be arranged without embracing the most unprecedented anomalies; nor can we doubt that if the animals of the fossil Terebratulæ and Anomiæ were known, for in this arrangement they rest on presumption only, they must be further separated in such a system than they are at present, some being perforated at the beaks, others imperforate, and some having the aperture under the beaks, all which demonstrates a difference in the structure of the animal, to whose use they were adapted. From this analysis of the generical distinctions of the different families of the Anomiæ we may now be permitted to return to the shell before us, the object of our more immediate consideration, and respecting which there appears to be no less misconception among late later writers than we have found already respecting the genera. It appears that Dr. Leach had some short time since published a figure of this shell: his definition is altogether brief, and the information he affords less explanatory than might be desired: he quotes no authority or synonyms, and in his general description merely observes that “It seems to be a very rare species, a few specimens only having been received from New Zealand.” _Vide. Zool. Misc. p. 76._ Lamarck assuming from these observations, as it may be presumed, that the shell had not been previously noticed, unless it were an Anomia Capensis of Gmelin, proposes it as a new species under the name of Terebratula Sanguinea of Leach, at the same time that he rejects his specific character, and assigns another to the species; the character given to it as a new species by Dr. Leach is “_Testa sanguinea, subtillissime et creberrime impresso-punctata, longitudinaliter costata, costis simplicibus; antica uniundulata_;” that of Lamarck, “_Testâ oblongâ, irregulari, rubrá, creberrimé impresso punctata; striis transversis undulatîs; margine denticulato_,” to which is added, “_Habite—les mers de la Nouvelle Zélande d’après M. Leach_.” This seems to shew that the shell was only known to Lamarck, through the communication of the last-mentioned writer; and the suggestion is the more probable since the specimen in the British Museum has the same interrogation as to being the Anomia Capensis of Chemnitz, that is annexed by Lamarck to his description of the species.