I2 4 



FERNANDUS PAYNE. 



f 



..* 



FIG. 2. Fitchia spinosula Stal. ."J and B, two female cells, metaphase, 

 polar view, 28 chromosomes ; C and D, two male cells, metaphase, 27 chromo- 

 somes ; E and .F, first maturation division, metaphase, showing 15 chromosomes 

 the three smallest ones are the differential chromosomes ; G and /, polar 

 views of the second division, metaphase only two of the differential chromo- 

 somes are shown, as the third lies beneath these two ; H and I, side views of 

 the second division, metaphase the triad group, formed by the three differen- 

 tial chromosomes, in the center ; K gives the typical appearance of the plasmo- 

 some and differential chromosomes during the greater part of the growth 



