The 



Journal of Heredity 



(Formerly the American Breeders' Magazine) 



Vol. VI, No. 5 May, 1915 



CONTENTS 



Zebu Cattle in Brazil, by B. H. Hunnicutt 195 



Zebu Crosses in Tvinisia, by M. Roederer 201 



The Cattle of Brazil, by Jose Maria dos Reis 203 



Xenia in Fowls, a Review of some recent German Work 212 



Barred Pattern in White Fowls 218 



More •' Eugenic Laws," by Dr. W. C. Rucker 219 



Heredity in Apples 226 



Nature or Nurture ?, by The Editor 227 



NEW PUBLICATIONS: Heredity and Environment in the Develop- 

 ment of Men, by Edwin Grant Conklin 240 



The Journal of Heredity is published monthly by the American Genetic 

 Association (formerly called the American Breeders' Association) for the benefit 

 of its members. Canadian members who desire to receive it should send 25 ceats 

 a year, in addition to their regular membership dues of $2, because of additional 

 postage on the magazine; foreign members pay 50 cents extra for the same 

 reason. Subscription price to non-members, $2.00 a year, foreign postage extra; 

 price of single copies, 25 cents. 



Entered as second-class matter February 24, 1915, at the postoffice at Washing- 

 ton. D. C, under the act of August 24, 1912. Contents copyrighted 1915 by the 

 American Genetic Association. Reproduction of articles or parts of articles 

 permitted provided proper credit is given to author and to the Journal of Heredity 

 (Organ of the American Genetic Association). Washington, D. C. 



Date of issue of this number, April 26, 1915. 



