He died at his home in Leiden in 1994 .
He was also a Member of the Royal Netherlands Academy of Arts and Sciences since 1952 and an Honorary Foreign Member of the American Society of Ichthyologists and Herpetologists .
Member died at Member 's home in Leiden in 1994 .
He was also a Member of the Royal Netherlands Academy of Arts and Sciences since 1952 and an Honorary Foreign Member of the American Society of Ichthyologists and Herpetologists .