A 



C a^ b ; d 



p ^ h c d c 



FiGUKE 150.— Outline of normal lympliocytes and their nuclei to show variations in size and shape 

 ■within and between breeds or stocks of chickens. 2,470 X. 



Single Comb White Legliorn, from Iowa State 



a-e 

 a-e 



C, a-€ 



62 



Ancona, from Hy-Llne Poultry Farms, Iowa. D, a-e 



Barrod Plymouth Rock, from Hy-Line Poultry ^ ^^ 



Farms, Iowa. ' 



New Hampshire, from Hy-Line Poultry Farms, F, a-e 

 Iowa. 



College, Genetics Department. 



Single Comb White Leghorn, from Hamilton 



Farm Bureau, Michigan. 



Rhode Island Red, from Hamilton Farm Bureau, 



Jlichigau. 



