| Scientific Name | Author | English Name |
|---|---|---|
| Dichonemertes hartmanae | unspecified | |
| Emplectonema buergeri | Coe, 1901 | Mottled ribbon worm |
| Emplectonema echinoderma | (Marion, 1873) | |
| Emplectonema gracile | (Johnston, 1837) | Green ribbon worm |
| Emplectonema neesii | (Orsted, 1843) | |
| Emplectonema purpuratum | unspecified | Leopard ribbon worm |
| Nemertopsella marri | Wheeler, 1940 | |
| Nemertopsis flavida | (Mcintosh, 1873) | |
| Nemertopsis gracilis | unspecified | |
| Nemertopsis quadripunctata | (Quoy & Gaimard, 1833) | |
| Nemertopsis tetraclitophila | Gibson, 1990 | |
| Paranemertes californica | unspecified | |
| Paranemertes carnea | Coe, 1901 | |
| Paranemertes pallida | Coe, 1901 | |
| Paranemertes peregrina | Coe, 1901 | Mud nemertean |