No. 587] VARIABILITY AND AMPHIMIXIS 661 



slightly more than three times the probable error. There- 

 fore the differences of the two constants appear to have 

 no particular value so far as the present material is 

 concerned. 



The analytical constants (Table III) necessary for the 



fitting of the curves indicate that type IV curves may be 

 used for each method of conjugation. In lateral con- 

 jugation the equation is 



y = 10.842 ( l + 297 2g 872 ) ^' X ^*^~»m 

 and in sealarit'onn conjugation similarly the equation is 



= 5.0014 1 + corv X 



while the frequency polygons and the fitted curves (Figs. 

 3, 4, and 5) illustrate the conditions diagramatically. 



P£sk. = .67449 Vl+8(8k.)« 



