British Bio-technology Group plc of Oxford, England, named RonIrwin commercial director. He is currently chairman andmanaging director of the U.K. subsidiary of Marion Merrell Dow.British Bio also named John Raisman and L. John Wilkersonnon-executive directors. Raisman retired as chairman and chiefexecutive officer of Shell UK Ltd. in 1985, and Wilkerson ischairman of The Wilkerson Group, a health care industryconsulting firm.

Immunomedics Inc. of Morris Plains, N.J., named to its board ofdirectors Richard Williams, founder of Conner-Thoele Ltd., afinancial and strategic advisory firm.

(c) 1997 American Health Consultants. All rights reserved.