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190 Alphabétique des Personnes avec lesquelles nous avons correspondu au sujet des Hybrides" is a most representative one, including many of our own contributors, some under a new appellation, as, for example, the Curator of the Leicester Museum, who appears as "pasteur à Rotterdam (Hollande)."

Neither time, trouble, nor expense has evidently been withheld in the production of this book, which incorporates a large amount of scattered information in a systematic and judicial manner, and will for a long time prove a recognized reference to a most important factor in zoological philosophy.

these pages (1897, p. 535) we published an announcement by Mr. Hett that he was preparing a Dictionary of the Call-notes of British Birds, and we have now received a tasteful and inexpensive book—interleaved for the record of observations by the reader—which may well find a place in the ornithological library. The method pursued is as follows:—Firstly, under "Note-Bird" an alphabetical list of the notes, with the name of the avian vocalist attached, is given, and then, under "Bird-Note," the arrangement is reversed. Easy reference is thus afforded, and the equivalents of the sounds themselves will and must be judged by specialists in the appreciation and interpretation of bird-notes. The Glossary of Popular, Local, and Old-fashioned Names of British Birds is a most excellent and useful compilation, which should prevent many errors on the part of too hasty transcribers of observations, and prove a boon to puzzled readers of local notes. A List is given of the 376 Birds accepted as British by the Committee of the British Ornithologists' Union in 1883, and also of the "Terms applied to Wild Fowl," as, for example, " a hill of, several."