| Avagina incola Leiper, 1902 |  |  |  | In common heart urchin, Echinocardium flavescens and Spatangus purpureus. | 
| Faerlea echinocardii Dörjes, 1972 | Jul 1934 | 25 m |  | parasite in the heart-urchin (Echinocardium flavescens), collected by T. G. Karling | 
| Plagiostomum cinctum Meixner, 1938 | Jul 25, 1923 |  |  |  | 
| Meara stichopi Westblad, 1949 | 1923 |  |  | lives in the intestine of host, although also found in the cavity of the body.  Host include Stichopus tremulus Gunn., Mesothuria intestinalis (in cavity of body) | 
| Meara stichopi Westblad, 1949 | 1923 |  |  | lives in the intestine of host, although also found in the cavity of the body.  Host Stichopus tremulus Gunn. | 
| Meara stichopi Westblad, 1949 | 1924 |  |  | lives in the intestine of host, although also found in the cavity of the body.  Host Stichopus tremulus Gunn. | 
| Anoplodiera voluta Westblad, 1930 | 1923 |  |  | Host Stichopus tremulus Gunn. | 
| Anoplodiera voluta Westblad, 1930 | 1924 |  |  | Host Stichopus tremulus Gunn. | 
| Umagilla elegans Bock, 1913 | 1924 |  |  | Host Stichopus tremulus Gunn. | 
| Umagilla elegans Bock, 1913 | 1923 |  |  | Host Stichopus tremulus Gunn. | 
| Wahlia macrostylifera Westblad, 1930 | 1924 |  |  | Host Stichopus tremulus Gunn. | 
| Wahlia macrostylifera Westblad, 1930 | 1923 |  |  | lives in the intestine of host, although also found in the cavity of the body.  Host Stichopus tremulus Gunn. | 
| Anoplodium stichopi Bock, 1925 | 1924 |  |  | Host Stichopus tremulus Gunn. | 
| Anoplodium stichopi Bock, 1925 | 1923 |  |  | Host Stichopus tremulus Gunn. | 
| Syndesmis echinorum Francois, 1886 | prior to 1926 |  |  | found with Echinus species. | 
| Urastoma cyprinae (Graff, 1882) | prior to 1926 |  |  | found in mantle cavity of Mytilus modiolus and Lima hians. | 
| Otocelis westbladi Ax, 1959 | prior 1975 | 5 m | Fucus |  | 
| Pseudmecynostomum flavescens (Dörjes, 1968) | prior 1975 | 0-5 m | mud algae |  | 
| Pseudmecynostomum westbladi Dörjes, 1968 | prior 1975 | 5 m | mud |  | 
| Nannorhynchides herdlaensis (Karling, 1956) | 1956 or earlier | 0.5-10.0 m |  | In different places in plants and shell, Westblad and Karling. | 
| Cylindrostoma fingalianum (Claperede, 1861) | 1950 or earlier | 15 m |  | Osund, station 25/53 | 
| Cylindrostoma gracilis Westblad, 1955 | 1950 or earlier | 15 m | sand | at Bergen biol. stat 56/53. | 
| Allostoma durum (Fuhrmann, 1896) | 1954 or earlier |  |  | 'according to Karling'. | 
| Cylindrostoma paralutheri Karling, 1993 | 1955 |  |  |  | 
| Promesostoma marmoratum (Schultze, 1851) | prior to 1943 |  |  | plentiful in the samples. | 
| Promesostoma marmoratum (Schultze, 1851) | prior to 1943 | 0.0-10.0 m |  | Dr. Karling and [Luther] found them in different habitats, mainly on algae. | 
| Macrostomum pusillum Ax, 1951 | 1974 or earler |  |  |  | 
| Pseudostomum klostermanni (Graff, 1874) | 1940 or earlier |  |  | from algae. | 
| Pseudostomum quadrioculatum (Leuckart, 1847) | 1940 or earlier |  |  | from algae. | 
| Enterostomula dura (Fuhrmann, 1896) | 1940 or earlier |  |  |  | 
| Scleraulophorus cephalatus Karling, 1940 | 1940 or earlier | 100 m | Korallensand, dead Korallenstöcke | Korallensand and pieces of broken, dead Korallenstöcke (Lophohelia and Amphihelia) with rich Epifauna. | 
| Placorhynchus echinulatus Karling, 1947 | Jul 17, 1934 |  | fine sand | Aus der Algenvegetation in der Hafenbucht bei der zoologischen Station. | 
| Brinkmanniella obtusa Luther, 1943 | Aug 7-11, 1934 |  |  | Sie stammen von zwei Fundorten mit sechtem Wasser: Bootshafen von Herdla, auf Ascophyllum un Fucus; und 0ö, Verbindung des Kvernepollen mit dem Meere (stark strömend), Algen mit viel Hydroiden und Bryozoen. | 
| Mecynostomum agile Jensen, 1878 | Jun 1878 or earlier |  |  | Jeg har fundet denne Art ved Herlø i Fjaeren mellem Ulvae meget talrig.  Juni.  Kjønsmodne Individer. | 
| Mesostomum marmoratum Schultze, 1851 | Jun 1878 or earlier |  |  | Arten forekommer paa alle de af mig undersøgte Lokaliteter (Bergen.  Alvaerstrømmen, Herlø, Sund), men er sjelden.  Den rødbrunt plettede Varietet er flere Gange funden. | 
| Vortex angulatus Jensen, 1878 | 1878 or earlier |  |  | Findesteder:  Bergen og Herlø, i Fjaeren mellem Fuscus i stor Maengde.  Dyret bevaeger sig meget hurtig og er altid i Rørelse.  Jeg har fundet kjønsmodne Individer hele Sommeren igjennem. | 
| Gyrator danielsoni Jensen, 1878 | 1878 or earlier |  |  | Findesteder:  Bergen, Herlø, Sartorø (ved Sunds Praestegaard) i Fjaeren, men isaer i nogle faa Fods Dybde, paa Fucus og Laminarier.  April til Juli.  Alle Individer kjønsmodne. | 
| Monocelis spinosa Jensen, 1878 | 1878 or earlier |  |  | Monocelis spinosa har jeg fundet paa Fucus i Fjaeren ved Bergen og Herlø, paa begge Steder sammen med M. hamata n. sp. (se nedenfor). | 
| Monocelis hamata Jensen, 1878 | 1848 or earlier |  |  | M. hamata har jeg fundet i stor Maengde i Fjaeren, men kun paa to Lokaliteter: Bergen (Fløen) og Herlø (naerved Hovedgaarden), paa begge Steder sammen med foregaaende Art. | 
| Prognathorhynchus karlingi Ax, 1953 | 1960 or earlier | 15 | sand | Westblad found the species at Herdla (seawards from Bergen on the Norwegian coast) in sand at ~15 m deep between Valen & Lamöy. | 
| Provortex tubiferus Luther, 1948 | 1948 or earlier | 6 m | fine sand | Norwegen, Herdla, u. a. südlich von Valet, feiner Sand, zusammen mit Pr. affinis, Karling (Juli) |