| Plagiostomum girardi (Schmidt, 1857) | Jul 8 and 13, 1949 | | | |
| Plagiostomum koreni Jensen, 1878 | Jul 8 and 13, 1949 | tide pool | | |
| Plagiostomum vittatum (Frey & Leuckart, 1847) | Jul 8, 1950 | tide pool | | |
| Trigonostomum setigerum Schmidt, 1852 | 21 July, 1949 | tidepool | | Westblad (coll. SMNH) |
| Nannorhynchides herdlaensis (Karling, 1956) | 1956 or earlier | | | tide pools, Westblad. |
| Cylindrostoma monotrochum (Graff, 1882) | Jul 8, 1949 | tide pool | | |
| Monoophorum stiliferum Westblad, 1955 | Jul 13, 1949 | tide pool | | Wembury Beach, 3 specimens, among algae in tide pool. |
| Monoophorum stiliferum Westblad, 1955 | Jul 21, 1949 | tide pool | | Wembury Beach, 3 specimens, among algae in tide pool. |
| Allostoma pallidum Beneden, 1861 | Jul 13, 1949 | tide pool | | |
| Cylindrostoma quadrioculatum (Leuckart, 1847) | Aug-Sep 1892 | | | Abundant among Florideae, Wembury Bay. |
| Enterostomum fingalianum Claparede, 1861 | Aug-Sep 1892 | | | Abundant among Florideae, Wembury Bay. |
| Cylindrostoma inerme (Hallez, 1879) | Aug-Sep 1892 | | | In dredgings taken from the Duke Rock, Millbay Channel, and Hamoaze. |
| Plagiostomum dioicum (Mecznikow, 1865) | Aug-Sep 1892 | | | Duke Rock and Wembury Bay. |
| Proporus venenosus (Schmidt, 1852) | Aug-Sep 1892 | | | It is not uncommon at the base of the littoral zone at Wembury Bay and Drake's Island. |
| Monoporus rubropunctata (O. Schmidt, 1852) | Aug-Sep 1892 | | | It is not uncommon at the base of the littoral zone at Wembury Bay and Drake's Island. |
| Convoluta flavibacillum Jensen, 1878 | Aug-Sep 1892 | | | Among sand in the creeks at Picklecombe Fort, Wembury Bay and Bovisand Bay. |
| Acrorhynchus caledonicus (Claperede, 1861) | Aug-Sep 1892 | | | Found among Fucus, Halydris, &c, in tide-pools near Picklecombe Fort and Redding Point; less commonly in Wembury Bay, |
| Plagiostomum elongatum Gamble, 1893 | Aug-Sep 1892 | | | A single specimen among sand, Wembury Bay. |