7 loose sheets of foolscap paper. The original notes of Prof. Bailey, contained upon slips of paper usually loosely wrapped around the slide, were faithfully transcribed, and the originals filed away for preservation. The whole, amounting to 372 sheets of foolscap, has been substantially bound, and is now available for reference. This new Catalogue of the Bailey Microscopical Collection consisting of 372 foolscap pages is in the Farlow Herbarium and according to the above report assimilated completely and without change in serial number slides previously registered in the Catalogue of the Bailey Microscopical Slides, which I have not found. The report promotes the expectation of the new Catalogue containing 2,184 entries - 793 by Bailey and 1,391 by Miss Washburn. However, the Catalogue describes only slides numbered from 567 to 2,185. Although rarely were numbers in this series omitted or used more than once, e.g. 780 and 780-1/2, the series should encompass c. 1,619 slides. Interestingly, entries numbered 567 through 2,185 are contained within c. 372 foolscap pages, and the handwriting break in the Catalogue between Bailey and Washburn (which is additionally marked by a notation that the transcribers had changed) occurs between serial numbers 793 and 794. At present I have no explanation of why the series commences with number 567 and not number 1, but I have found neither slides nor references to slides in the collection bearing numbers in the range 1 to 566. I interpret the annual report to be misleading in the number of slides that Bailey registered; he registered only probably the 227 of them having numbers between 567 and 793. Also, based primarily on the fact that the Catalogue appears complete in having 372 pages, the range of serial numbers provides the best estimate of the extent of the collection in 1877 (independent of the 1,838 slides reported elsewhere), which I judge to be c. 1,619 slides.