DUHRING, dieting, Eugen Karl, German philosophical writer ; b. Berlin, 12 Jan. 1833. He studied at the University of Berlin, and prac tised law for a time; he then became professor of philosophy and political economy at Berlin in 1864, but gave up the position on account of quarrels with the faculty. He has written 'Der Wert des Lebens' (1865), which did much to introduce the positivism of Comte into Germany; 'Kritische Geschichte der Philos ophic> (1869) ; 'Logik und Wissenchafts (1878); 'Die Judenfrage als Rassen-; Sitten-, und Kulturf rage' (1892) ; also a num ber of works in political economy, including 'Kapital und Arbeit> (1865) 'Die Verkleinerer Careys) (1867) ; and 'Kritische Geschichte der NationalOkonomie und des Sozialismus) (1879). Consult Doll, 'Eugen Diihring) (1883).
crker- or dorker-bOk, a genus of small antelopes (Cephalolophus), native to southern Africa. They are character ized by small, straight horns, generally present in both sexes; and by an upright tuft of hair between the horns. The typical species (C. grimmi) is found in bush-covered districts from the Cape of Good Hope to the Zambesi River, and ranges even farther north along the west coast of Africa. It stands about 26 inches high; its ears are long and narrow; its color is yellowish-brown, with a tendency to gray; but the color is decidedly variable. The horns,
in this species present only in the male, are from three to five inches long, and rise at a sharp angle to the face. Of the allied species the following are the most important: The red buck of Natal (C. natalensis), which differs from C. grimmi in that its horns incline back ward, and are present in both sexes; and that its color is more reddish. The bluebuck of the jungle (C. monticola) is a tiny creature, only 13 inches high at the shoulder, that swarms in the Natal region. It is smaller and lighter in build than a hare; is bluish mouse-color, and has tiny straight horns. It feeds on berries and young shrubs. The zebra-antelope of West Africa (C. dories.) is distinguished by its coat of rich golden-brown, banded with eight or nine transverse lines across the back loins. The wood antelopes, also West African, are nearly three feet tall, and are classed in two species, C. sylvicultor and C. jentinki.
The name Cluiker" signifies °ducker* or °diver,* in allusion to the animal's rapidity of motion when in the thickets. Consult Schwein furth, Heart of Africa' (Leipzig 1878) ; and other books by African explorers and natural ists.