Photoreception and sensory transduction in Aneural Organisms,NATO advanced study institutes series A,Vol. 33: Edited by Francesco Lenci and Giuliano Colombetti Plenum Press,New York, 1980. $45.00 in U.S.A. and Canada and $54.00 outside U.S.A. and Canada (432 pp.) ISBN 0-306-404370-0

(?) 2-Amino-7-phosphonoheptanoate and (?) 2-amino-5-phosphonovalerate were shown to possess selective and powerful antagonistic activity vis-à-vis the neurotoxic effects of ibotenic acid in the rat hippocampal formation. The neurotoxicity of kainic acid was not blocked by either drug.