The Natural History Society of Jamaica will host a seminar on Invasion of the Green Mussel, Prena Viridis by Dr. Dunbar Steele, Department of Life Sciences, The University of the West Indies on Wednesday, June 25 at 6:00 p.m. at the PCJ Auditorium, 36 Trafalgar Road. On Saturday June 28 there will be a field trip to Moody’s Gap in Portland. The bus leaves Liguanea Club at 8:00 a.m. Contact Herman Tobisch at tel. 702-2888 or fax 970-4199 for further information.