LUZK, a circle of the province of Volhynia, in Russia, extending in north latitude from 50. 33. to 51. 34. and in east longitude from 25. 4. to 25. 37. The northern part is marshy, the southern very fertile. The capital is a city of the same name, situated on the river Styr, 1126 miles from St Petersburg. It contains one Catholic and several Greek churches, 600 houses, and 3150 inhabitants. Long. 25. 5. E. Lat. 50. 44. N.