5. HEREDITY OF HAIR-LENGTH IN GUINEA-PIGS 



AND ITS BEARING ON THE THEORY 



OF PURE GAMETES 



BY 



W. E. CASTLE AND ALEXANDER FORBES 



PAPERS JDF 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 



