JOURNAL OF GENETICS, VOL XI. NO. 3 



PLATE XXVIII 





■>^ V 



Vi?«k^- 





'V^ 



^^^^^B 



/^5 



'' -spT* 



\»k, '-;;j>»^' ^ 



li 



^■"-^<X^ 



n 



WW 



mm 



10 



11 



12 



