CONTENTS. 



Part I. Further Experiments upox the Modifiability of the Hooded 



Character in Rats. 



PAGE 



Selected races crossed with wild 2 



Part II. The Inheritance of White-spotting in Rabbits, with Special 

 Reference to Gametic Contamination. 



Dutch 5 



English 19 



Relation of Dutch to English 25 



Part III. Observations on the Occurrence of Linkage in Rats and Mice. 



Tables 37 



Bibliography 56 



5r?S12 



