A limnological survey was carried on by the writer in the following lakes of South Sakhalin in the summer of 1934; Tibesani-taiko, Tibesani-syôko, Waai-ko and Horahune-ko on the coast of Aniwa-wan (Aniva Bay), and Tyatya-numa, Bakko-numa and Raitisi-ko on the west coast. The morpbometrical data of these lakes are given in tables 1 and 8, the temperature and pH in table 2, and the chemical properties of the lake water in table 7.
Tibesani-taiko (table 3), Tibesani-syôko (table 4) and Horahune-ko (table 6) belong to eutrophic Corethra plumosus type with Einfeldia, and Waai-ko (table 5) to mesotrophic Einfeldia type. Raitisi-ko (table 10) is a brackish water lake and Macoma baltica, an eurythermal and euryhaline clam, is very common.
There were collected many interesting animals which are new to Japanese fauna, e g. Kamaka kuthae, Piscicola geometra, Cristatella mucedo (statoblasts only), Limnochares holosericea, Thyas oblongata, Forelia ligulifera, Nereis alinensis O_KUDA and Valvata pulchella saghalinensis M_IYADI. All of them are recorded from Europe or Siberia, except the last two which are new to science.

抄録全体を表示