THE NERVOUS SYSTEM OF VERTE 

 BRATES. By J. B. JOHNSON, Ph.D., Professor of 

 Zoology in West Virginia University. With One Hundred 

 and Eighty Illustrations. 15*. net. 



CONVERGENCE IN EVOLUTION. By 



ARTHUR WILLEY, D.Sc., Lond. ; Hon. M.A., Cantab. ; 

 F.R.S. With Diagrams. Demy 8vo. 7*. 6d. net. 



This work brings together some scattered facts of parallel development of 

 outward form and internal structure in the animal kingdom, introducing 

 new cases and fresh interpretations. It is, taken as a whole, an original 

 contribution to the theory of organic evolution, with special reference to the 

 forms of animal life. 



THE HEREDITY OF ACQUIRED CHAR 

 ACTERS IN PLANTS. An Aspect of the true 

 Darwinism based on Personal Observations and Experiments. 

 By the Rev. Prof. GEORGE HENSLOW. With Illustrations. 

 Demy 8vo. 6s. net. 



The object of this work is to substantiate Darwin's alternative explana 

 tion of Evolution, which replaces his theory of ' The Origin of Species by 

 Means of Natural Selection. ' He maintained that new forms arose by the 

 ' direct action of changed conditions of life,' and that, if these persisted for 

 several generations, the variations produced by them would be hereditary. 

 The author herein describes experiments and observations which entirely 

 confirm this later view of Darwin, held by him in 1876. It is precisely the 

 same as is that of all plant-ecologists of to-day. 



NOTEWORTHY FAMILIES (SCIENCE). 



An Index to Kinships in near degrees between persons 

 whose achievements are Honourable, and have been publicly 

 recorded. By FRANCIS GALTON, D.C.L., Hon. D.Sc. Camb., 

 F.R.S., and EDGAR SCHUSTER, Galton Research Fellow in 

 Natural Eugenics. Crown 8vo. 6s. net. 



MICROSCOPY. The Construction, Theory, and Use 

 of the Microscope. By EDMUND J. SPITTA, F.R.A.S., 

 F.R.M.S., etc. With numerous Diagrams and Illustrations. 

 Second Edition. i2S. 6d. net. 



