| 1 |   | Bacillaria (x 400), --- by Tsukii, Yuuji at Lab. of Biol., Hosei Univ. | 
| 2 |   | Bacillaria (x 400), --- by Tsukii, Yuuji at Lab. of Biol., Hosei Univ. | 
| 3 |   | Bacillaria (x 400), --- by Tsukii, Yuuji at Lab. of Biol., Hosei Univ. | 
| 4 |   | Bacillaria (x 400), --- by Tsukii, Yuuji at Lab. of Biol., Hosei Univ. |