5. HEREDITY OF HAIR-LENGTH IN GUINEA-PIGS 



AND ITS BEARING ON THE THEORY 



OF PURE GAMETES 



W. E. CASTLE AND ALEXANDER FORBES 



PAPERS j)F THE STATION FOR EXPERIMENTAL EVOLUTION AT COLD SPRING HARBOR, 

 NEW YORK, No. 5 



CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY OF THE MUSEUM OF COMPARATIVE 

 ZOOLOGY AT HARVARD COLLEGE. E. L. MARK, DIRECTOR. No. 175 



