Polycera faeroensis Lemche, 1929, and Doto dunnei Lemche, 1976, new for the Dutch fauna and the central North Sea (Gastropoda, Nudibranchia)

The nudibranchs Polycera faeroensis and Doto dunnei are reported for the first time from The Netherlands and the central North Sea. These two species were found during an expedition that focussed on identifying biodiversity in the Dutch part of North Sea, i.e. on the Cleaver Bank and the Dogger Bank. Directly after the expedition Doto koenneckeri, Eubranchus tricolor and Tritonia hombergii were mistakenly reported as being new to The Netherlands. The records of D. koenneckeri and E. tricolor concerned misidentifications whereas Tritonia hombergii was already known for The Netherlands. Additionally an updated list of the Dutch sea slugs, Sacoglossa and Nudibranchia (Gastropoda, Opisthobranchia) is given.