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1. Small selected patches of retina (approximately 1 mm2) were exhaustively searched electrophysiologically to identify every brisk‐transient unit present. The patches were then marked by electrolytic lesions. 2. Whole‐mount preparations were made from which the distribution of alpha cells within and around the marked areas could be obtained. 3. A one‐to‐one correspondence could be demonstrated between brisk‐transient units and alpha cells. 4. The correspondence was maintained within a patch of retina including the central area. 5. The correspondences were subject to about 10% of uncertainty attributed to technical limitations of the method.