With the few additions contained in the Appendix we shall now conclude; trusting that in the remarks drawn from us by the present state of the science in this country, our zeal for truth will not give us an appearance of want of candour or of vanity. The truth of our remarks on the labours of others, every one at all acquainted with the subject can inquire into, and either acknowledge or disprove: we neither deprecate nor despise criticism: an author who presumes to instruct others, should have his pretensions publicly canvassed, his merits admitted, or his deficiency exposed; no one is more sensible than we are that our own pretensions chiefly consist in having set an example for others more able to follow: and if we have in any way advocated the cause of truth and science, our object will be attained, and we shall then gladly retire in the shade. LONDON, Sept. 15, 1821. * * * * * LIST OF BOOKS REFERRED TO. _Bruguire, Encycl. Meth._ Histoire Naturelle des Vers, par M. Bruguire, 1 vol. 4to. and 4 vols. of Plates, forming part 10, 19, 21, 23, of the "Encyclopedie Methodique." Paris, 1789-1792. _Bloch._ Histoire Naturelle des Poissons, en 6 parties, 8vo. Berlin, 1796. _Cramer._ Papillons Exotiques, 4 vols. 4to. Amsterdam, 1779-1782. _Cuvier._ Le Regne Animal, 4 vols. 8vo. Paris, 1817. _Chemnitz, Martini._ Neus Systematisches Conchylein Cabinet, 11 vols. Nurnburg, 1781-1795. _Dill._ A Descriptive Catalogue of Recent Shells. By F. W. Dillwyn, 2 vols. 8vo. London, 1817. _Edwards._ A Natural History of uncommon Birds, &c.; and Gleanings of Natural History. By G. Edwards, 7 vols. 4to. 1763, &c. _Fab. Ent. Syst._ Entomologia Systematica, emendata et aucta. J. C. Fabricius, 4 vols. 4to. Hafnia, 1792-1794. _Gen. Zool._ General Zoology, commenced by Dr. Shaw, and continued by Mr. Stevens, 11 vols. 8vo. to 1819. _Gmelin Linn. Syst. Nat._ C. Linne Systema Naturae. Cura J. F. Gmelin. Lipsiae, 1788-1793. _Godart in Encycl. Method._ Encyclopedie Methodique, t. 9. p. 1. 1819. _Gualtieri._ Index Testarum Conchyliorum quae adservantur in Musaeo N. Gualtieri. Florentiae, 1742. _Illiger._ Prod. Systematis Mammalium et Avium, 8vo. Berolini, 1811. _Knorr._ Les Delices des Yeux et de l'Esprit, 6 P., 4to. Nuremb. 1760, &c. _Klein Hist. Pisc._ Historiae Nat. Piscium promovendae Missus, 6, 4to. Dantzic, 1740-49. _Linn. Syst. Nat._ See Gmelin. _Linn. Trans._ Transactions of the Linnean Society of London, 13 vols. 4to. 1791-1821. _Lister._ M. Lister Historia Conchyliorum, folio. Oxonii, 1770. _Lamarck Syst._ Hist. Nat. des Animaux sans Vertebres. Par le Chevalier de Lamarck, 6 vols. 8vo. Paris, 1815-1819. ---- _Anal. Mus._ Annales du Museum d'Histoire Naturelle de Paris, 4to. 1802-1821.