Synopsis of the naviculoid diatoms. Presented to the R. Swedish Academy of Sciences May 10, 1893 - Cleve, P. T. (Per Teodor), 1840 -1905 (Norstedt, 1894)

System der nudibranchiaten Gasteropoden - Bergh, Rudolph, 1824 -1909 (C.W. Kreidel's Verlag, 1892)

System der Pterylographie. Nach seinen handschriftlich aufbewahrten Untersuchungen verfasst - Burmeister, Hermann, 1807 -1892 (E. Anton, 1840)

Systema naturae, per regna tria naturae : secundum classes, ordines, genera, species cum characteribus, differentiis, synonymis, locis - Linné, Carl von, 1707 -1778 (Typis Ioannis Thomae, 1767)

Systema naturae per regna tria naturae : secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis - Linné, Carl von, 1707 -1778 (Typis Ioannis Thomae, 1767)

Systema natvræ per regna tria natvræ : secvndum classes, ordines, genera, species, cvm characteribus, differentiis, synonymis, locis - Gmelin, Johann Friedrich, 1748 -1804 (Typis Academicis, 1793)

A systematic catalogue of British insects : being an attempt to arrange all the hitherto discovered indigenous insects in accordance with their natural affinities - Stephens, James Francis, 1792 -1853 (Baldwin and Cradock, 1829)

Systematische Beschreibung der bekannten europäischen zweiflugeligen Insekten - Meigen, Johann Wilhelm, 1764 -1845 (s.n, 1830)

Systematische Beschreibung der Plagiostomen - Henle, Jacob, 1809 -1885 (Veit und comp, 1841)

Systematisches Conchylien-Cabinet - Kobelt, Wilhelm, 1840 -1916 (Bauer und Raspe, 1837)

Systême silurien du centre de la Bohême - Barrande, Joachim, 1799 -1883 (Chez l'auteur et éditeur, 1874)

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Tableau encyclopédique et méthodique des trois règnes de la nature. Insectes - Latreille, P. A. (Pierre André), 1762 -1833 (Chez Panckoucke, 1818)

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Tentamen determinationis digestionis atque denominationis singularum stirpium lepidopterorum peritis ad inspiciendum et dijudicandum communicatum - Hübner, Jacob, 1761 -1826 (Reprinted in facsimile by S.H. Scudder, 1873)

Testacea utriusque Siciliae eorumque historia et anatome : tabulis aeneis illustrata - Delle Chiaie, S. (Stefano), 1794 -1860 (Ex regio typographeio, 1826)

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Thesaurus imaginum piscium testaceorum : quales sunt cancri, echini, echinometra, stellæ marinæ, &c. ut et cochlearum ... quibus accedunt conchylia, ut nautilus, cornu Ammonis, & conchæ univalviæ et bivalviæ ... denique mineralia - Rumpf, Georg Eberhard, 1627 -1702 (apud P. van der Aa, 1711)

Thesaurus ornithologiae : Repertorium der gesammten ornithologischen Literatur und Nomenclator sämmtlicher Gattungen und Arten der Vögel, nebst Synonymen und geographischer Verbreitung - Giebel, C. (Christoph), 1820 -1881 (Brockhaus, 1877)

Das Thierreich eingetheilt nach dem Bau der Thiere als Grundlage ihrer Naturgeschichte und der vergleichenden Anatomie - Cuvier, Georges, baron, 1769 -1832 (J.S. Cotta, 1821)

Das Thierreich eingetheilt nach dem Bau der Thiere als Grundlage ihrer Naturgeschichte und der vergleichenden Anatomie - Cuvier, Georges, baron, 1769 -1832 (J.S. Cotta, 1825)

Das Thierreich, geordnet nach seiner Organisation : als Grundlage der Naturgeschichte der Thiere und Einleitung in die vergleichende Anatomie - Cuvier, Georges, baron, 1769 -1832 (F.A. Brockhaus, 1832)

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