Euchexcnza gebcimiae is a red algae Hainan of China. A sulphated isolated from this algae. D-galactose and 3 6-anb.川ro-D--glactvse are Was mawr vent of this polysaccharide. The molecular weight was 1.99. Its specific was a positive value. compo- rotation The gelling ability of the polysaccharide increased due to tha presence ofmost of alkali metal ions and alkali-earth metal ions. Yhen the pvlysaccharida was treated with alkali or lime, the polysaccharide desulphste, and sulphate groups decreased and 3,6-and galactosa content increa- sed. fhe III spectra, of the polys.echaride showed absorption peaks at 1240 em-1, 930 cry and 845 em-1. Fractionation of the polysaccharide with potassium chloride eld pvtassiunz chlo- ridsoluble and insoluble fraction. IR spectra of soluole fraction showed absor Xioneak at 820 cm-' besides at 1244 cmr;, 930 em0I and $45 em.as insoluble fraction. According to the composition, properties and IR spectra of the polysaccharide, it was deduced that potassium chlorideJsvluble fraction is xnu-carrageenan-like, and in- soluble fraction is kappaKcarrageenan-like.