IN the first of these two books Prof. Newton makes good progress with the catalogue of the unrivalled collection of eggs to which it is devoted, dealing in this instance with the pigeons, game-birds, rails, cranes, bustards, waders, gulls, and auks. Needless to say, it is written in the same style as its two predecessors, consisting almost entirely of Mr. Wolley's original notes, with such comments as the editor considered it advisable to intercalate here and there. To review the fasciculus is impossible within the limits of our space, and we can only refer to a few points of special interest. One of these relates to the eggs of the knot, of which a presumed specimen, laid in confinement, was given to the author by Lord Lilford; the correctness of this identification has been recently confirmed by the discovery of “wild” specimens. Equally interesting is the record of the first known egg of the stint, obtained by Middendorf in Siberia in 1843. The culminating interest of this fasciculus is, however, concentrated on the superb series of eggs of the great auk possessed by Mr. Wolley, which included no less than seven actual specimens, together with several casts. The first of the originals the author bought in 1846 for twenty-eight shillings; it may, perhaps, be now worth ten times as many pounds! Coloured figures (two of each) of the seven auks' eggs and of one of the casts form the illustrations to this fasciculus; and in the execution of these plates Mr. H. Grönvold has surpassed himself, having succeeded not only in showing the colouring and markings to perfection, but also in imitating to a nicety the very grain and texture of the shell. The eight specimens show very clearly the range of variation to which the colour and markings of the eggs of the species were subject. (1) Ootheca Wolleyana: an Illustrated Catalogue of the Collection of Birds' Eggs formed by the late John Wolley. Edited by Alfred Newton. Part iii., Columbæ to Alcæ. (London: R. H. Porter, 1905.) Price 2l. 2s. (2) Eggs of the Native Birds of Britain and List of British Birds, Past and Present. By W. J. Gordon. Pp. 64; 398 illustrations. (London: Simpkin, Marshall and Co., Ltd., 1905.) Price 3s. 6d.