THE FARLOW HERBARIUM of HARVARD UNIVERSITY 20 DIVINITY AVENUE · CAMBRIDGE · MASSACHUSETTS 02138 · U.S.A. Copies of "The Jacob Whitman Bailey Diatom Collection at the Farlow Herbarium" have been forwarded to the following herbaria for use by diatom systematists and taxonomists: AWH, BHU, BM, HDSM, LD, OS, PC and PH (abbreviations follow Index Herbariorum). Additional copies are available from the Farlow Herbarium at cost although no copyright restriction is attached to this publication. Notice of the availability of this work is intended for Taxon. As work on the remaining portions of the Boston Society of Natural History Collection at the Farlow Herbarium progresses, I anticipate that some amplification and correction of these registers and indices will occur; notice of such changes will be forwarded to the above herbaria. The recommended citation of this work is: Edgar, Robert K. 1978. The Jacob Whitman Bailey Diatom Collection at the Farlow Herbarium. Farlow Herbarium, Harvard University, Cambridge, Massachusetts, U. S. A. iii + 155 pp. Robert K. Edgar 11 July 1978