130 



FERNANDUS PAYNE. 





-i 



H 



FIG. 4. Conorhinns sanguisugus Lee. /4 and 5, male chromosome-groups, 

 23 chromosomes ; C and Z), polar views of the first maturation division, meta- 

 phase the three differential chromosomes he in the middle of the irregular 

 ring ; E and F, polar views of the second mitosis only two differential 

 chromosomes are shown ; G and H, two anaphases of the second division 

 taken from the same spindle and 'which show the manner in which the triad 

 group separates ; 7 and J , side views of the second division, metaphase, show- 

 ing arrangement of the triad group ; K, a stage in the early growth period, 

 about contraction-phase the three dark bodies are the three differential chromo- 



