Regional differences in cell density and cell genesis in the olfactory epithelium of the salamander, Ambystoma tigrinum Exp Brain Res (1985) 58:426 _'ment BranR �9 Springer-Verlag 1985 Erratum Regional differences in cell density and cell genesis in the olfactory epithelium of the salamander, Ambystoma tigrinum Mackay-Sim, A. and Patel, U. Experimental Brain Research (1984) 57:99-106 One page 104, paragraph 3, line 11, the sentence "This observation is consistent with a similar ante- rior-to-posterior gradient in the numbers of receptor cells reported recently for another urodele amphi- bian, Triturus cristatus (Dubois-Dauphin et al. 1980) should read: "This observation is contrary to another urodele amphibian, Triturus cristatus in which the posterior epithelium contained m o r e receptor cells than the anterior (Dubois-Dauphin et al. 1980). Announcement The Xth Internatioal Congress of Neuropathology will take place in Stockholm, Sweden, September 7-12, 1986 For further information contact X International Con- gress of Neuropathology, c/o Stockholm Convention Bureau, P.O. Box 1617, S-111 86 Stockholm, Sweden. There will be four major symposia: 'energy crisis in the brain. Causes and consequences' (chairman: F. Plum, United States), 'viral infections' (chairman: R . T . Johnson, United States), 'pathobiology of the axon' (chairman: S. Waxman, United States) and 'neuro-transmitter and receptor systems in health and disease' (chairman: A. Dahlstr6m, Sweden). In addition there will be daily plenary lectures on important developments in neuropathology and neu- robiology, slide seminars on muscle diseases, intra- cranial tumours and tropical infections of the nervous system. Finally, free communications and workshops as well as poster sessions will be arranged. Prof. P. Sourander will serve as president of the congress and Prof. A. Torvik is the chairman of the program committee.