DAVENPORT AND HULLARD. — CORRELATED VARIATION. 97 



errors of the metliod. The males are about 2.o% more variable than the 

 females. The glands are 0.8 '<) more variable on the left side than on 

 the right. The relative variability of the same leg in the different sexes 

 is about 1.6% greater than that of the two legs in the same sex. The 

 degree of correlation in the variability of the right and left legs is about 



,777. 



Cambridge, M.\ss., July 25, 1896. 



VOL. XXXII. — / 



