He investigated the Cretaceous fauna of Gosau, and studied the Crustacea, including Entomostraca, the corals, bryozoa, and especially the Foraminifera of various geological formations and countries.
2.
His " Hydrachn?in Aquis Dani?Palustribus detect?et descript?" ( Leipzig, 1781 ), and " Entomostraca " ( 1785 ), describe many species of microorganisms previously unknown, amongst other dinoflagellates.
3.
In conjunction with David Robertson and George Stewardson Brady ( 1832 1921 ) he wrote the " Monograph of the Post Tertiary Entomostraca of Scotland ", etc . for the Palaeontographical Society ( 1874 ); and he edited Henry Carvill Lewis's " Papers and Notes on the Glacial Geology of Great Britain and Ireland ", issued posthumously ( 1894 ).
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