20 



THEOPHILUS S. PAINTER 



of threads, drawn as they he in one nucleus. We have three steps 

 of the fusion illustrated here — the threads lying more or less 

 together, a pair of threads in which partial fusion has taken place 

 and a pair of threads in which all but the ends have joined to- 



Text fig. 2 Various stages taken from the growth period of the first sperma- 

 tocytes. 



gether. The single leptotene threads are distinctly knotted, and 

 in synapsis these knots join together. There is some contraction 

 (synezesis) of the nuclear content at this time, but it is not very 

 marked. The ^bouquet stage' (text fig. 2, C) is a striking fea- 

 ture of many of my slides. In addition to the thread loops, one 



