Scacchi, 1862; , 1866, 1870; , 187112; 1898, 1899; Rose, Sa-debeck, 1876; Sadebeck, 1876, 1878; Baker, 1880; Weiss, 1880; Baum-hauer, 1881; Boutari, 1886; Dana, 1892; , 1899, 1901; Hintze, 1904; Crookes, 1905, 1909; Hussak, 1906; Becke, 1907; Kunz,:Washing-ton, 1907; Kaiser, 1909; Fersrnan, Goldschmidt, 1911; Van der Veen,, 1913; Sutton, 1928; Polinard, 1929, 1930, 1931; Williams, 1932 .)1.

(Fersman, Goldschmidt, 1911; , 1948; , 1954, 1955; , 1963), , . . , , , .

(Rome de l'lsle, 1783; Haiiy, 1801 .) .