From 1924 to 1948, he worked in of the Laboratory of Zoology at the Royal Veterinary and Agricultural University located in Frederiksberg, Denmark.
Starting in 1949, he worked in the Department of Zoology at the University of Copenhagen.
He became Curator of Molluscs at the Zoological Museum in 1955, and Master Assistant in 1962.
He wrote Fra Molekyle til Menneske (1945)[2] and many scientific papers.
The cephalopods were then thought to have evolved from a monoplacophoran-like ancestor[4] with a curved, tapering shell.