This paper reports results of study on the contents of proteins

amino acids

polysaccharose and uronic acids in 30 species of macroalgae from Shicao

Heishijiao

Shimiao

and Xiaofujiazhuang in the vicinity of Dalian City

N.E.China. The results showed that the protein contents of the 30 algae from highest (112.55 μ g/ml) to the lowest (0.24 μg/ml) was in the descending order ofDictyopteris ndalata

Gelidium vagum

Gymnogongrus japonican

Ectocarpus confervoides

Tinocladia crassa

Sargassum thunberii. In general

the protein content in red algae was higher than that in brown algae. The content of free amino acids showed no significent differences from 7.44 μg/ml4.96 μg/ml in all these algae

in the descending order ofGymnogongrus japonican

Sargassum confusum

Undoria pinnatifida

Laminaria japonica andEctocarpus confervoides. The content of polysaccharose varied from 168.2 μ/ml-22.15 μg/ml in the descending order ofSymphocladia latiuscula

Scytosiphon lomentarius

Desmarestia viridis.

Tinocladia crassa

Gracilaria asiatica andPorphyra yezoensis. The content of uronic acids is from 196.24μg/ml-20.77 μg/ml in the descending order ofUlva lactuca

Symphyoclaldia latiuscula

Scytosiphon lomentarius

Ceramimum kodoi

Gracilaria vemucosa andPorphyra yezoensis. The fatty acids in 30 species of algae belong to Rhodophyta

Chlorophyta and Phaeophyta. Most phaeophytes have many (4–12) types of fatty acids.