48 



MASS STUDIES IN BUILD. 



vs 



M 



VF 



Fig. 13. — Percentage distribution of prog- 

 eny of table VII, S X M matings. 

 Number of individuals, 313. 



vs 



M 



VF 



Fig. 14. — Percentage distribution of prog- 

 eny of table VIII, S X F matings. 

 Number of individuals, 179. 



VS 



M 



VF 



VS 



M 



VF 



Fig. 15. — Percentage distribution of progeny of 

 table IX, S X VF matings. Number of indi- 

 viduals, 50. 



Fig. 16. — Percentage distribution of prog- 

 eny of table X, M X M matings. 

 Number of individuals, 332. 



