NOTICES OF NEW BOOKS. 523 



the Linnean Society. To those who would study in an authori- 

 tatively 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 in- 

 separable 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. 



A Hand-Book to the Birds of Great Britain. Vols, i.-iv. By 

 E. Bowdler Sharpe, LL.D. Edwd. Lloyd, Limited. 



Under 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 



* The first volume, which was then published by W. H. Allen & Co., 

 was reviewed in this Journal, 1894, p. 468. 



2o2 



