This survey was made by Dr June Chatfield on 2 September 2001.
The weather was damp and mild, with heavy rain during part of the fieldsession.
| Scientific Name | Common Name | Description | Remarks |
|---|---|---|---|
| Carychium minimum | Least Herald Snail | Elongate, white, 2 mm. | Two live specimens at base of dead hemlock water dropwort stem. |
| Succinea putris | Common Amber Snail | Elongate, amber colour, shell mostly body whorl, small spire, c. 10 mm. | Abundant and widely distributed on vegetation in open areas. Living colony including egg masses at ground level. |
| Cochilcopa lubrica | Slippery Moss Snail | Elongate, narrow, brown, glossy shell, tall spire c. 6 mm. | A few only, alive in meadow. |
| Arion ater agg. | Great Slug | Large slug with granular mantle, anterior breathing pore, rounded tail, no keel, rough tubercles and foot fringe (orange in some). | All slugs pale brown. |
| Arion subfuscus | Dusky Slug | Medium sized (20-30 mm) tan colour and yellow slime. | One found. |
| Arion circumscriptus agg. | slug | Two Juveniles, grey with white sole. | |
| Arion intermedius | Hedgehog Slug | Small 10- 20 mm, hunches into hemisphere, yellow sole. | Under dead wood. |
| Aegopinella nitidula | Waxy Glass Snail | Flat and thin shell, dull polish, 9 mm, noticeable umbilicus. | |
| Oxychilus helveticus | Glossy Glass Snail | Flat and thin shell, translucent, highly glossy, rich brown shell, black part of body at lip, tiny umbilicus. | A species only found in southeastern section of Britain. |
| Deroceras laeve | Marsh Slug | Small (10 mm), pinky brown, watery look. | One in meadow on rush. |
| Deroceras reticulatum | Common Grey Field Slug | White - pale pink/grey, 20-30 mm. Keel on tail, thumb-print mantle, breathing pore on posterior of mantle. | |
| Macrogastra rolphii | Rolph's Door Snail | Elongate, 15 mm, longitudinal ridges, brown. Small body. | One found on ground in wet meadow - alive. British distribution limited to the southeast but very common in East Hampshire, Alton, Selborne, Petersfield. |
| Monacha cantiana | Kentish Snail | 18 mm, subglobular shell ,white with pink at mouth. Small rib inside lip of adult. Small umbilicus. | A few alive only. Southeastern. Introduced by Romans. |
| Trichia striolata | Strawberry Snail | 15 mm, subglobular to flat, cream to reddish brown, umbilicus below. | In nettles |
| Trichia hispida | Common Hairy Snail | 7 mm, subglobular, brown, hairs on shell, umbilicus distinct. | One only near edge of reserve. |
| Arianta arbustorum | Orchard Snail | Globular, maroon shell with peripheral dark brown line and white flecks. Black/grey body. 25 mm. Adult with reflected lip. | Abundant and widely distributed. |
| Cepaea hortensis | White-lipped Snail | Globular, colour variable. Pink or yellow, may have 5 spiral brown bands, sometimes fused. | Abundant and widespread. |
| Helix aspersa | Common Garden Snail | Large and brown. 30 mm. | More shells than live ones. |
| Pisidium sp. | Pea Mussels | Bivalves. 2-3 mm. | In mud from flooded stream. |