Humber the two main lines of the autumn immigratory flights converge and overlap." This publication is, however, much more than a "List"; as regards the time of specific appearances it is a veritable manual. The information is concise, and, we need scarcely say, thoroughly authenticated. We will quote the note appended to the Great Bustard (Otis tarda): "The last Lincolnshire Bustard was shot in 1818, in Thoresby Field, near Louth, by Mr. Elmhirst, and sent as a present to Sir Joseph Banks.... The last two eggs of the Bustard, as the late Sir Charles Anderson, of Lea, told me, were taken in 1835 or 1836, on his father's property at Haywold, near Driffield, on the Yorkshire wolds. On November 11th, in 1864, a dead female Bustard, still warm, was picked up at sea, in Bridlington Bay." A note is attached to every species, and each note will probably afford a subsequent quotation.
In our last volume (1898, p. 514) we noticed the third part of this very useful publication. The fourth, devoted to the "Mammifères," has just reached us, in which 209 figures are distributed in a space of 84 pages.
The synoptical method is again pursued, and we know of no other work of a similar size where structural characters can be so easily appreciated and used for differential purposes. The illustrations are somewhat coarse, but their help will be appreciated by the young zoologist, and the information afforded is not exclusively for one side only of the English Channel.
We all hear and, as a rule, enjoy the cries of wild birds; but how few recognize them; how seldom are they analyzed; how
