THE RESTING NUCLEUS 7 



tinction between two forms of nuclear division, 

 mitosis and atnitosis, regarding all kinds of amitosis 

 as merely modified or concealed mitosis. While it 

 is clear that most of the nuclear phenomena in 

 Protozoa which were formerly regarded as amitosis 

 are best considered in this light, there is no doubt 

 that true amitosis occurs in many somatic tissues of 

 insects (fat body, genital ducts, &c.). Here the 

 chromosomes probably divide and separate into their 

 halves in a ' resting ' nucleus and are then passively 

 distributed in approximately, but not exactly, equal 

 numbers to the two daughter nuclei into which the 

 original nucleus divides by elongation into a ' dumb- 

 bell ' shape.ii* 



