THE SPERMATOGENESIS OF Hysrip Peas 543 
Fic. 32. Fillbasket  Debarbieux. Metaphase of the first nuclear division of tet- 
rad ; germination of microspore. 
Fic. 33. Fillbasket  Debarbieux. Reconstruction of the vegetative and the 
generative nuclei in first mitosis of tetrad nucleus. 
PLATE Ig 
Fic. 34. Express, pure race. (Reduced.) 
Fic. 35. Serpette, pure race. (Reduced.) 
Fie. 36. Express & Serpette, showing Express reversion. (Reduced. ) 
Fic. 37. Express Serpette, showing Serpette reversion. Both of the figures of 
Express > Serpette were drawn from plants selected at random. They are representa- 
tive second generation forms, (Reduced. ) 
