 
 
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400
 150 μm; x 400
 
 
Paramecium caudatum, strain Tn-2, 
cell body  μm long,  μm wide, 
x 400, Nogi shrine, Nishinasuno-machi, Tochigi Pref., Japan, 1999 by Y. Tsukii
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400
 150 μm; x 400
 
 
Paramecium, strain Ssi-1, 
cell body  μm long,  μm wide, 
 (Shingashi River, Saitama Pref., 1999), x 400, by Y. Tsukii
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400
 150 μm; x 400
 
 
Paramecium caudatum, strain Ssi-2., 
cell body  μm long,  μm wide, 
  (Shingashi River, Saitama Pref., 1999), x 400, by Y. Tsukii
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400
 150 μm; x 400
 
 
Paramecium caudatum, strain 230-1, 
cell body  μm long,  μm wide, 
 (Vermont-Maine, USA, August 1999), x 400, by Y. Tsukii
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400
 150 μm; x 400
 
 
Paramecium caudatum, strain 250, 
cell body  μm long,  μm wide, 
 (Vermont-Maine, USA, August 1999), x 400, by Y. Tsukii
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400
 150 μm; x 400
 
 
Paramecium caudatum, strain 259 , 
cell body  μm long,  μm wide, 
(Vermont-Maine, USA, August 1999), x 400, by Y. Tsukii
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400
 150 μm; x 400
 
