It may interest our readers if we remind them that with the publication of our July Number the Geological Magazine enters upon the fiftieth year of its existence. The first number was issued in July, 1864, and the first volume consisted of six numbers for the half-year. Consequently the commencement of the fiftieth Volume took place in January of the present year. It must be a matter for congratulation to the Editor that during so extended a period he has personally edited every number, excepting three, when he took a long vacation in Italy and could not conveniently deal with proofs. Such a record is probably unique. It is moreover satisfactory to learn that there has at no time been a serious lack of useful material wherewith to fill the pages of the Magazine. In our copy of Vol. I there are lists of Local and Foreign Correspondents; among the former is the name of the Rev. H. H. Winwood, and among the latter are the names of Baron Adolph. von Koenen and Dr. Anton Fritsch. Amongst surviving contributors to the 1864 volume may be recorded the Rev. Osmond Fisher, Sir Archibald Geikie, Professor Edward Hull, Sir E. Ray Lankester, and Henry Woodward.