VARIABILITY AND AM1'IIIM1X1> 





































f 



\ - 



\ 





















1 



r 























4- 

























/ / 





: \ 



-A-- 



\\ 



















p- 





i : 



\ 

















/ 

























/ 



















spores was one micron, measurement being made at the 

 maximum diameter. An inspection of the distribution 

 shows at once the greater concentration of the variates 



TABLE IV 

 ; from Spirogyra quadrata (Haas.) 200 ] 



ATION AND 200 PRODUCED BY SCALARIFOR] 



tN Classes according to Frequencies. 



INITUDES IN 1/10 ft. 



f Zygospores in Microns. 



■_>::.o -2-.V.) 

 24.0-24.9 

 25.0-25.9 



32.0-32.9 

 33.0-33.9 

 34.0-34.9 



:v_-.u y,2.'.) 

 33.0-33.9 

 34.0-34.9 



Total. 



