本邦産淡水藻類の数種について

　筆者はこれまでに北海道および山陰地方を中心とした本邦産淡水藻類の調査を行つているが，これまでに本邦新産種として発表された藻類について，その後の調査からこれに新たに加うべき産地および生態上，形態上の新知見を得た。またその後二，三の本邦新産種と考えられる藻類についての知見を得たので，ここに報告したい。
　稿を草するにあたり，常日頃変らぬ御指導をいただいている恩師北海道大学教授山田幸男博士に心からなる感謝の意を表わす。
　また有カな御助言と御教示をいたたいた神戸大学教授広瀬弘幸博士に心からなる感謝の意を表わす。また貴重な標本をいたたき発表の機を与えられた東京教育大学山岸高旺氏に心からなる感謝の意を表わす。

In this paper the following five species of fresh-water algae from Japan are
reported ;
1. Draparnaldiopsis alpina SMITH and KLYVER
The newly found habitats of this alga are as follows ;
1. Arai, Niigata prefecture(T. YAMAGISHI 1959).
2. Asahigawa, Hokkaido (T. YAMAGISHI 1959).
3. Naka-yubetsu, Hokkaid (T. YAMAGISHI 1959).
The rhizoidal portion of this alga is described and some abnormal branches in
the main axis are obseved.
II. Fritschiella tuberosa IYENGAR
The distribution of this alga in San-in region is reported.
In the culture experiments the following results are observed ;
1. Stigeoclonium type of this alga is formed in the course of abnormal growth of
secondary projecting system.
2. The secondary formatlon of clusters from projecting system is observed.
3. The chloroplasts of each cells forming clusters is single laminate parietal containing
one or more than pyrenoids.
III. Trentepohlia willei (TIFFANY)PRINTZ
Habit. Matsue(Rakusan), Shimane prefecture(M. AKIYAMA 1958).
New to Japan.
IV. Phycopeltis irregularis (SCHMIDLE) WILLE
Habit. Matsue(Soto-Nakahara), Shimane prefecture (MAKIYAMA 1958).
New to Japan.
V. Oedocladium spp.
Habit. Sanbe, Matsue, Shimane prefecture (M. AKIYAMA 1958, 1959). Matsuzaki,
Tottori prefecture (M. AKIYAMA 1959). Tokyo (T. YAMAGISHI 1959).
The specific identification of these materials is indeterminable as they are in sterile
stage.
New to Japan.