292 Genetic Studies in Poultry 



4. Broodiness is a highly complex character. F^ hens are generally 

 broody. The proportion of broody to non-broody birds in F^ varies 

 greatly in different crosses. 



5. The factors for broodiness and for egg-colour are transmitted by 

 the cock as well as by the hen. 



6. Though there is slight evidence of some association between the 

 brown egg and the broody habit, the two characters may be dissociated. 

 It is clearly possible to establish a non-broody strain laying brown 



EXPLANATION OF PLATE IX. 



Fig. 1. Egg of Brown Leghorn. 



Fig. 2. Egg of i*2 ? (487/13) ex Langshan ? x Br. Legh. <J. Classed as grade 11. 



Fig. 3. Egg of Fi ? ex Br. Legh. ? x Langshan <? . Classed as grade 5. 



Fig. 4. Egg of Hamburgh ? . 



Fig. 5. Egg of F^ ? (250/13) ex Langshan ? x Hamburgh <? . Classed as grade 11. 



Fig. 6. Egg of Fi ? ex Langshan ? x Hamburgh i . Classed as grade 6. 



LITERATURE. 



Bateson, W. and Saunders, E. R. Reports to the Evolution Committee of the Royal 



Society. Report i. 1902. 

 Bateson, W. and Punnett, R. C. "The Inheritance of the Peculiar Pigmentation 



of the Silky Fowl." Joiir. Oen. I. 1911. 

 Dauthenay, H. Repertoire des Couleurs, publie par la Societe fran§aise des Chrysan- 



th^mistes et Ren^ Oberthiir avec la collaboration de Henri Dauthenay. 1905. 

 HoLDEFLEiss, P. "Versuche Uber Xenienbildung und Vererbungsgesetze bei der 



Kreuzung von Hiihnem." Ber. phys. Lab. u. Verstichsanst. landwirt. Inst. 



Univ. Halle, 1911. 

 Hurst, C. C. Reports to the Evolution Committee of the Royal Society. Report li. 1905 



