| Common Name | Scientific Name | Comment |
| Morro Shoulderband Snail | Helminthoglypta walkeriana | Federal Threatened Species |
| Big Sur Shoulderband Snail | Helminthoglypta umbilicata | |
| Surf Shoulderband Snail | Helminthoglypta fieldi | |
| Common Garden Snail ●● | Helix aspersa | from Europe |
| Glass Snail ● | Oxychilus draparnaudi | from Philippines |
| White Garden Snail ● | Theba pisana | from Mexico |
| Various slugs ● | many non-native |