title: Erratum.
abstract: The item on Clarence J. Hylander [Science 130, 1244 (1959)] indicated that he left the post of executive director of the American Institute of Biological Sciences to take his current position as visiting professor of biology at Bowdoin College. He last held the AIBS post in 1953; since that time he has been an information officer for the Army Chemical Corps and has written a number of books.