Attention having been drawn of late to the “Northampton Sand” by the able papers of Mr. George Maw and Mr. Judd, and by the discussions which arose upon them, and to the Oolitic beds of Northamptonshire generally, by the too concentrated article (so rich in information) by Professor Morris, in the Geological Magazine for March, and by a letter from the Rev. P. B. Brodie elicited thereby in the May number, I venture to offer the following provisional statement as to the Oolitic strata in the neighbourhood of Northampton, and the order in which they occur, purposing at some future time to write more fully upon them, to enumerate the palæontological contents of each bed, and to endeavour to correlate the Northampton series with those occurring in the more northerly parts of the county and around Stamford.