PREFACE. 



In this paper arc recorded observations upon inheritance in rabbits 

 which were made in the Harvard Zoological Laboratory with the aid of a 

 grant from the Carnegie Institution of Washington. The authors desire 

 to express their appreciation of that aid, without which these observations 

 could not have been made. 



The experiments described were planned by the senior author, and 

 this report also was written by him. Dr. H. E. Walter has made the 

 majority of the extremely laborious observations and computations con- 

 cerning the inheritance of ear-length and of body-weight. Dr. R. C. 

 MuUenix prepared and measured the rabbit skeletons as a foundation for 

 Part III of this paper; while both Dr. Walter and Mr. Cobb rendered 

 valuable assistance in connection with the study which has been made of 

 color inheritance. The senior author alone is responsible for the analytical 

 treatment of the observations. 



