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Mar., t9o6 [ OCEANODROMA LEUCORHOA ON THE PACIFICCOAST. 55 breeding on the Farallone Island3 by Mr. Loomis, July 7, I896, tho I did not.hap- pen to find it there on my visits in ?885-87. The above two specimens measure respectively: ,3, wing 6.oo, tail 3.25, forking of tail, o-55, tarsus o.95; ??, wing 6.m, tail 3.25, forking of tail o.58, tarsus o.9o. Not having access to any other material From California, I cannot at present say anything in regard to the relation of the Farallone birds to either kaedingi or beldingi. I wish to thank Mr. Robert Ridgway for the opportunity of examining the fine series of Atlantic Coast leucorhoa in the U.S. National Museum. I am also indebted to the Carnegie Museum for the loan of the series of kaedingi from the Anthony collection. To Messrs. Grinnell, Mailliard and Bohlman, I am under obligation for similar kindnesses rendered. l?ra. ywards, Cal. Methods of Filing Reprints RICIIARI) C. ?tC?.;REGOR OONER or later in the development of a private scientific library, reprints be- come so numerous that much time is expended in looking for particular papers unless some simple system is employed in filing them. I propose to describe one or two methods of filing such papers in the hope that others wlll give us some ideas on the subject. The essential conditions to be fulfilled are that any given title shall be readily accessible and that the papers shall be preserved from injury. In the early stages of a library's growth papers may be classed by authors or by regions and each set kept in a heavy Manila paper envelope. Author's name and list of contained titles should be written on one corner of the envelope. This is practically the same system as that fostered by literary supply companies who manufacture light wooden boxes, size of a book, open on one side, in which pamphlets are kept. The boxes stand on one end like so many books; titles of the contained papers are written on the back. Neither of the above systems are satisfactory. The papers are subject to misplacemerit and may even be lost, and they become worn and soiled in handling. There remain, however, two inethods, both of which have been found excel- lent and each has its followers. I will describe each of these briefly. First: Cut heavy Manila paper in two or three sizes to fit folio, octavo, etc., when folded once. Now furnish each pamphlet with one of these covers and give it a number in the corner. The title and author may also be written on the cover. The covered pamphlets are now to be set on end in deep drawers or in boxes of suitable sizes. With a card index of authors, any paper desired may be easily found. Papers kept in this way might be arranged alphabetically by authors and the card index done away with. This method is a very good one and commends itself on account of its cheapness anal the fact that papers may be added one or many at a time. Second: Have papers of a similar size bound together in book form when- ever enough accumulate to make a conveniently sized volume. Papers may be