| Macrostomum sinyaense Young, 1976 | Jun 19, 1972 |  |  | 3 sites on Machakos Farm, Machakos, near Nairobi.  12 specimens from pool in stream with no flow; 17 specimens stream with slow flow and vegetation on muddy bottom; 2 specimens small pool choked with vegetation. | 
| Olisthanella truncula (Schmidt, 1858) | Jun 19, 1972 |  |  | Pool, containing much aquatic vegetation, on drying stream bed on Percival's Farm.  Machakos, near Nairobi.  2 specimens. | 
| Myostenostomum tauricum (Nasonov, 1924) | Jun 19, 1972 |  |  | Pool, containing much aquatic vegetation, on drying stream bed on Percival's Farm.  Machakos, near Nairobi.  2 specimens. | 
| Mesostoma lingua (Abildgaard, 1789) | Jun 19, 1972 |  |  | Pool on stream bed which was drying up on Percival's Farm, Machakos, near Nairobi.  1 specimen. | 
| Gyratrix hermaphroditus Ehrenberg, 1831 | Jun 19, 1972 |  |  | Pool on drying stream bed on Percival's Farm, Machakos, near Nairobi.  1 specimen. | 
| Stenostomum arevaloi Gieysztor, 1931 | Jul 1972 |  |  | two specimens from pools in a slow-moving river, chocked with Typha and other unidentified plants, on Percivals farm near Mackakos. | 
| Stenostomum leucops (Duges, 1828) | 1971-1972 |  |  | Athi River to Hunter's Lodge road:  stream and two dams on Percival's Farm, Machakos. |