CLAUS, klous, (1835-99). A German zoölogist, born in Cassel.
He studied the natural sciences in Giessen, under
Leuckart; in 1863 became professor of zoölogy
in Marburg, in 1870 in Göttingen, and in 1873 in
Vienna. He was also director of the zoölogical
station at Triest. He was very active in the
investigation of the Crustacea, and is also widely
known because of his Text-Book of Zoölogy. Of
his numerous works, the following are important: Die freilebenden Copepoden (1863); Beiträge zur Kenntnis der Ostracoden (1868); Grundzüge der Zoölogie (1868); Ueber den Bau und die Entwicklung der Cumaceen (1870); Die Metamorphose der Squilliden (1872); Ueber die Entwicklung Organisation und systematische Stellung der Arguliden (1875); Lehrbuch der Zoölogie (6th ed., 1897; trans. into English, under the title of Text-book of Zoölogy, by Claus and Sedgwick, London, 1897).