The Journal of 



HEREDITY 



, ^ monmij pmizdioYi dewkd toflad^reedim 

 i Animal £reeding and Ememcs 



Round Tip Tobacco East and Jones 



Inheritance in Swine Jay L. Lush 



Origin AND Development OF THE Nervous System . . (Review) 

 Heritable Characters of Maize .... C. B. Hutchison 



POLYDACTYLISM IN CaTTLE ElMER RoBERTS 



A Toothless Type of Man K. I. Thadani 



Inbreeding and Crossbreeding J. L. Collins 



Inheritance of Mental Traits (Review) 



PUBLISHED MONTHLY AT MENASHA, WISCONSIN 



BY THE 



AMERICAN GENETIC ASSOCIATION 



EDITORIAL AND GENERAL OFFICES 

 WASHINGTON, D. C. 



Volume XII, Number i February, 1921 



