Abstract
Diatoms in an epiphyte algal sample from Sugao-numa (Sugao Swamp) were exam-. ined, and a total of 258 taxa among 39 genera were recorded. All of the taxa that occurred abundantly were attached species in particuler, Eunotia curvata, Achnanthes minutissima, Gomphonema parvulum and Navicula mutica var. mutica. The DAlpo value calculated from the relative frequencies of each taxon observed was 50.7.
