| Oligochoerus limnophilus Ax & Doerjes, 1966 | Jun 7-12, 1971 | littoral | stone | stone embankments and stony shores of the littoral zone.  The sixteen Netherlands lakes sampled by the authors are connected by canals, so it is difficult to indentify natural rivers. | 
| Dendrocoelum lacteum (Müller, 1773) | Jun 7-12, 1971 | littoral | broken bricks | West shore.  Broken bricks.  Vegetation, Phragmites, little Scirpus, little detritus.  31-100 individuals per hour. | 
| Dendrocoelum lacteum (Müller, 1773) | Jun 7-12, 1971 | littoral | vegetation | West shore.  Broken bricks.  Vegetation, Phragmites, little Scirpus, little detritus.  1-10 individuals per hour. | 
| Dugesia polychroa (Schmidt, 1861) | Jun 7-12, 1971 | littoral | vegetation | West shore.  Broken bricks.  Vegetation, Phragmites, little Scirpus, little detritus.  1-10 individuals per hour. | 
| Dugesia polychroa (Schmidt, 1861) | Jun 7-12, 1971 | littoral | broken bricks. | West shore.  Broken bricks.  Vegetation, Phragmites, little Scirpus, little detritus.  31-100 individuals per hour. | 
| Dugesia tigrina (Girard, 1850) | Jun 7-12, 1971 | littoral | broken bricks. | West shore.  Broken bricks.  Vegetation, Phragmites, little Scirpus, little detritus.  1-10 individuals per hour. | 
| Polycelis tenuis Ijima, 1884 | Jun 7-12, 1971 | littoral | broken bricks | West shore.  Broken bricks.  Vegetation, Phragmites, little Scirpus, little detritus.  31-100 individuals per hour. | 
| Polycelis tenuis Ijima, 1884 | Jun 7-12, 1971 | littoral | vegetation | West shore.  Broken bricks.  Vegetation, Phragmites, little Scirpus, little detritus.  31-100 individuals per hour. | 
| Microstomum lineare (Müller, 1773) | Jun 7-12, 1971 | littoral | vegetation | West shore.  Broken bricks.  Vegetation, Phragmites, little Scirpus, little detritus.  31-100 individuals per hour. | 
| Microstomum lineare (Müller, 1773) | Jun 7-12, 1971 | littoral | broken bricks | West shore.  Broken bricks.  Vegetation, Phragmites, little Scirpus, little detritus.  31-100 individuals per hour. |