438 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



Polygon No. 12R. 



Polygon No. 12L. 



1 2. Meropodite of second leg on side of small chela. Polygons No. 

 12R and 12L. Attention may be called to the fact that in both Rights 

 and Lefts the meropodite on the side of the great chela is larger than that 

 of the opposite side. This apparently indicates that tlie influences which 

 determine the development of the great chela affect other parts of the 

 body as well. 



4. Table of Correlation of Meropodites of Chelae. 



In Table V. the correlation of the meropodites of the chelae of the left- 

 handed animals is shown. This was determined in order to see whether 

 there was not an inverse correlation ; for it seemed not improbable that 

 an unusually large Great Chela should be accompanied by an exceptional 

 small Small Chela. Such, however, is not the case ; instead there is a 

 fairly close direct correlation, 0.774f . 



