| Species not observed since 2000 are maked * | ||
| PORIFERA (Sponges) | ||
| SPONGILLIDAE: | ||
| River Sponge.* | Ephydatia fluviatilis (Linnaeus) | |
| Formerly encrusting stones in streams | ||
| flowing through Area V. | ||
| CNIDARIA (Hydra) | ||
| HYDROIDA. | ||
| HYDRIDAE: | ||
| Green Hydra.* | Hydra viridissima (Pallas) | |
| Contained in water samples from the Newt Pond (A). | ||
| Brown Hydra.* | Hydra oligactis (Pallas) | |
| Contained in water samples from the Newt Pond (A). | ||
| PLATYHELMINTHES (Flatworms) | ||
| TRICLADIDA. | ||
| PLANARIIDAE: | ||
| Flatworm.* | Polycelis nigra (Müller) | |
| Found under stones in main stream. | ||
| Flatworm.* | Polycelus felina (Dalyell) | |
| Found under stones in main stream. | ||
| ROTIFERA (Rotifers) | ||
| Wheel Animal.* | (Species not determined). | |
| Contained in water samples from the Newt Pond (A). | ||
| TARDIGRADA (Tardigrades, Water-bears) | ||
| (Species not determined). | ||
| ANNELIDA (Segmented Worms) | ||
| CHAETOPODA. (Earthworms) | ||
| Earthworm | Lumbricus sp. | |
| Earthworm.* | Allolobophora sp. | |
| Potworm.* | Mesenchytraeus sp. | |
| HIRUDINEA. (Leeches) | ||
| Leech. | (Species not determined). | |