1. Genera and species of Baetidae in Japan: Nigrobaetis, Alainites, Labiobaetis, and Tenuibaetis n. stat. (Ephemeroptera)

   • Toshihito Fujitani
   • Toshiya Hirowatari
   • Kazumi Tanida

   RESEARCH PAPER Pages: 121 - 129

2. Accumulation and depuration of microcystin produced by the cyanobacterium Microcystis in a freshwater snail

   • Kazuhiko Ozawa
   • Atsushi Yokoyama
   • Ho-Dong Park

   RESEARCH PAPER Pages: 131 - 138

3. Sedimentary photosynthetic pigments of algae and phototrophic bacteria in Lake Hamana, Japan: temporal changes of anoxia in its five basins

   • Nobuyasu Itoh
   • Yukinori Tani
   • Mitsuyuki Soma

   RESEARCH PAPER Pages: 139 - 148

4. Indirect method to estimate convective gas flow through culms of a Phragmites australis stand

   • Mitsuru Hirota
   • Takayoshi Tsuchiya

   NOTE Pages: 149 - 153

5. Vertical planktonic structure in the central basin of Lake Baikal in summer 1999, with special reference to the microbial food web

   • Shin-ichi Nakano
   • Osamu Mitamura
   • Valentin Drucker

   NOTE Pages: 155 - 160

6. Development of filamentous green algae in the benthic algal community in a littoral sand-beach zone of Lake Biwa

   • Kentaro Nozaki
   • Khadbaatar Darijav
   • Osamu Mitamura

   NOTE Pages: 161 - 165

7. First investigation of ultraoligotrophic alpine Lake Puma Yumco in the pre-Himalayas, China

   • Osamu Mitamura
   • Yasushi Seike
   • Mitsugu Nishimura

   ASIA/OCEANIA REPORT Pages: 167 - 175

8. Microbial communities in oligotrophic Lake Toya, Japan

   • Akiko Nakano
   • Syuhei Ban

   ERRATUM Pages: 177 - 177