Abstract
With the purpose of elucidating the annual cycle of algal flora at a certain “fixed” location on the Pacific coast, regular observations were carried out at the “observation reef” defined by the author at Manadzuru Peninsula, Kanagawa, Japan.
The results of the regular inspection of the place from November, 1937 to October, 1938 were described with respect to the number of algal species discovered at the observation reef, with special reference to the first appearance, the maximal vigor of growth and the final disappearance of each algal form.
Summing up through the year, there were 88 species of algae discovered from the observation reef, which belonged to the families of Chlorophyceae (9 species), Phaeophyceae (22 species) and Rhodophyceae (57 species).
The seasonal changes in the algal formation were investigated by following the life cycle of each algal form from its first appearance on the reef to its final disappearance from the place. Formation of cystocarps and tetraspores were also followed with the red alga forms.
