2 APRIL 1904, Page 24

The Natural History of Animals. By J. R. Ainsworth Davis,

M.A. Half-Vol. VI. ,(Gresham Publishing Company. 7s.)— Professor Davis's work is not, we may say for the benefit of readers not acquainted with it, constructed on the usual lines. Its method is more scientific. This half-volume, for instance, he begins with a chapter on " Animal Movement." Under this comes the section "Animal Locomotion," distinguished again into "Parachuting" and "Kite-flying." The "parachuting animals" are mammals—e.g., flying squirrels - of various kinds—birds (the pigeon), reptiles, flying fishes ; among the " kite-flyers" are spiders and flies. Then there is a chapter on "Muscular Locomotion," instanced in bats, pigeons, plovers, and various insects. Chapters follow on " Animal Development" and "Animal Life-Histories," similarly subdivided.