| Catenula lemnae Duges, 1832 | prior to 1913 | | | in a neighborhood of London. |
| Gieysztoria diadema (Hofsten N, 1907) | prior to 1913 | | | vegetation in Chigwell Row, London pond. |
| Dalyellia viridis (Shaw, 1791) | prior to 1913 | | | a pond near Chigwell Row, London. |
| Typhloplana viridata (Abildgaard, 1789) | Oct 21, 1916 | | | British Museum whole mount from London. Unidentifiable because of poor quality. |
| Rhynchomesostoma rostratum (Müller, 1774) | prior to 1926 | | | from Chigwell Row. |
| Gyrator hermaphroditus Ehrenberg, 1835 | prior to 1913 | | | Chigwell Row. |
| Planocera uncinata Palombi, 1939 | 1939 or earlier | | | |
| Prosthiostomum delicatum Palombi, 1939 | 1939 or earlier | | | |
| Prosthiostomum russoi Palombi, 1939 | 1939 or earlier | | | |
| Thysanozoon brocchii (Risso, 1818) | 1939 or earlier | | | |
| Leptostylochus capensis Palombi, 1938 | 1939 or earlier | | | |
| Stylochoplana tenuis Stimpson, 1857 | 1939 or earlier | | | |
| Notoplana patellarum (Stimpson, 1855) | 1939 or earlier | | | |
| Planocera gilchristi Jacubowa, 1906 | 1939 or earlier | | | |
| Bothromesostoma personatum (Schmidt, 1848) | 1913 or earlier | | | E. London |
| Bdellocephala punctata (Pallas, 1774) | 1978 or earlier | | | under stones in several of the soft-water lakes of the Lake District, from more productive habitats....even from some of London's rivers. |