Sorry for the mass maiing but I do not know who is in charge of the group. Please note that I am retiring so please remove me from the group. PS: One of the best groups on campus. Thanks Jim -- Jim Tremain, B2 Rm 147B Phone: (519) 888-4567 ext. 36420 Biology, Univ. of Waterloo EMAIL: jim at sciborg.uwaterloo.ca Waterloo, ON, CANADA N2L 3G1