Page:The Zoologist, 4th series, vol 1 (1897).djvu/555

Rh the Linnean Society. To those who would study in an authoritatively condensed manner the principles of the theories of Isolation and Physiological Selection in the process of organic evolution, as more or less opposed to what may be perhaps styled the all-sufficiency of Natural Selection as held by Mr. Wallace, this volume must of course be recommended. The arguments are here, their acceptance must be left to the reader, but their bearings on modern evolutionary speculation cannot be ignored.

This volume, as was the case with the last, has received the able supervision, and in some chapters the selective discretion, of Prof. C. Lloyd Morgan, and a portrait of Gulick forms an excellent and interesting frontispiece. New terms seem inseparable from any new theory of the method of evolution or a restatement of an old one. We notice the creation of "apogamy" for separate breeding, and "homogamy" for segregate breeding.

the popular name of 'Lloyd's Natural History' there is a possibility of this high-class work on British Ornithology being somewhat overlooked. It is not a re-edited and enlarged volume of the old Jardine series, but a thoroughly new and standard work written by one of our best authorities, and as such bound to be freely consulted and widely used. The many publications already existing on our native birds or those found in these islands make it imperative that new books on the subject do not necessitate unknown authors, while the information now required is that of an authoritative, condensed, and up-to-date character. Perhaps no work on British Zoology is to-day more difficult than the production of a new work on British Birds. The material for life-histories and habits is unlimited, but amidst these vast chronicles of avian existence great selective judgment is necessary, for all that are new may not ultimately prove true, nor are the true always new. In some books we wish that much might have been added, in others that much might have been