Fig. C. — a and b : diagrams to show the two alternative 

 modes of behaviour of a chromosome with two spindle 

 attachments at anaphase ; c : a diagram of the method 

 of anaphase-separation in one of the germ-line chromo- 

 somes in Ascaris megalocephala ; the numerous spindle 

 attachments are situated so close together that those in 

 one chromatid always go to the same pole. 



