Wilhelm Hermann Abich, a German-Russian naturalist, born in Berlin, Dec. 11, 1806. He graduated in 1831 at the university of Berlin, visited Italy and Sicily, and published Erlau-temde Abbildungen von geologischen Ersclici-nungen, beobachtet am Vesuv and Aetna 1833 and 1834 (Berlin, 1837), and Ueber die Natur and den Zusammenhang der vulkanischen Bildungcn (Brunswick, 1841). In 1842 he became professor of mineralogy in the university of Dorpat, and in 1853 a member of the St. Petersburg academy of sciences. He has explored the mountain ranges of the Caucasus, Russian Armenia, northern Persia, and Daghes-tan, and published in the German and French languages many works relating to the palaeon-tology, geology, etc, of those regions, besides his contributions to the bulletins and memoirs of the St. Petersburg academy since 1843.