| Microdalyellia schmidtii (Graff, 1882) | prior to 1882 |  |  | Vortex Schmidtii in a 'moortumpel' above the villa 'Fernbank' in Millport, Scotland. | 
| Proxenetes flabellifer Jensen, 1878 | 1913 or earlier |  |  | beach water. | 
| Proxenetes cochlear cochlear Graff, 1913 | 1913 or earlier |  |  |  | 
| Promesostoma marmoratum nudum Graff, 1905 | 1913 or earlier |  |  |  | 
| Danorhynchus duplostylis Karling, 1955 | prior to 1955 | 20 m | sand | Millport, aus mit Sand gemischtem Lehm in etwa 20 m Tiefe bei Keppel Pier Fairley. | 
| Avagina incola Leiper, 1902 | 1902 or earlier |  |  | found in the accessory canal of about 5 per cent of the Echinocardium cordatum [common heart urchin] at Millport | 
| Convoluta paradoxa Ørsted, 1843 | Aug-Sep 1892 |  |  | Widely distributed in the littoral zone; nowhere, however, very abundant, nor do the specimens attain the dimensions of Millport examples. | 
| Microdalyellia armigera (Schmidt, 1862) | 1882 or earlier |  |  | Brittische Inseln.  Schottland, Millport | 
| Rogneda anglica Karling, 1953 | 1953 or earlier | 10-36 m | loam |  |