| Plagiostomum pseudomaculatum (Gamble, 1893) | | w | primary taxonomic authority (describer) | 474 |
| Cylindrostoma elongatum (Levinsen, 1879) | | w | other taxonomic work | |
| Polycystis naegelii Kölliker, 1845 | [with synonyms] | w | other taxonomic work | 462, t. 39, f. 5; t. 40, f. 15 |
| Plagiostomum sulphureum Graff, 1882 | | w | other taxonomic work | 472, t. 41, f. 20 |
| Plagiostomum dioicum (Mecznikow, 1865) | | w | other taxonomic work | 471, t. 40, f. 11 |
| Plagiostomum siphonophorum (Schmidt, 1852) | | w | other taxonomic work | 477 |
| Plagiostomum vittatum (Frey & Leuckart, 1847) | [with synonyms] | w | other taxonomic work | 475 |
| Monoophorum elongatum Gamble, 1879 | | w | other taxonomic work | 485, t. 41, f. 19 |
| Automolos ophiocephalus (Schmidt, 1861) | | w | other research on this sp. | 492-493 |
