( xi v ) 



TABLE OF PRINCIPAL ADDITIONS AND CORRECTIONS. 



( Continued.') 



123 



281 



103 



271 



Additional facts with respect to the inherited effects 

 of circumcision. 



Dr. Brown-Sequard on the inherited effects of opera- 

 tions on the Guinea-pig. 



Other cases of inherited mutilations. 



An additional case of reversion due to a cross. 



Inheritance as limited by sex. 



Two varieties of maize which cannot be crossed. 



Some additional facts on the advantages of cross- 

 breeding in animals. 



Discussion on the effects of close interbreeding in 

 the case of man. 



Additional cases of plants sterile with pollen from 

 the same plant. 



Mr. Sclater on the infertility of animals under con- 

 finement. 



The Aperea a distinct species from the Guinea-pig. 



Prof. Jager on hawks killing light-coloured pigeons. 



Prof. Weismann on the effects of isolation in the 

 development of species. 



The direct action of the conditions of life in causing 

 variation. 



Mr. Romanes on rudimentary parts. 



Some additional cases of correlated variability. 



On Geoffroy St. Hilaire's law of " soi pour soi" 

 The chapter on Pangenesis has been largely altered 

 and re-modelled; but the essential principles re- 

 main the same. 



