Dear Moshe,
  I wish I was going to Copenhagen with you. There are several type
collections in the Zoological Museum of Copenhagen. Perhaps you could see
some of it. There is the Moltke Collection, I think the Galathea material is
there, Powell named several species of Pectens from the Galathea hauls and
his types are there. I think Gmelin's material is there
  I am sure there are other worth collections there, I just can't think of
them all at the moment.
     Have fun,
          Carole Marshall