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Cover picture: Time-lapse imaging of the caudal migratory stream in the developing mouse cortex. Horizontal slices of cultured telencephalic hemispheres were prepared at 40 h in vitro after local electroporation into the caudal ganglionic eminence (CGE) at embryonic day 13.5. A significant number of the caudally migrating cells derived from the CGE exhibited a clear migratory stream toward the hippocampus. The time interval between frames is 15 min (from left to right). For details, see the article by Yozu et al. in this issue (pages 7268–7277).