B 



D 



FIG. i. Diagrams illustrating the manner of operation in the several experi- 

 ments. A, removal of the great chela and the posterior appendages of the opposite 

 side, causing the larger amount of material to still remain on the great chela side; 

 B, the opposite operation as a control; C, the heavy lines show the places at which 

 portions of the great chela may be cut away without reversal; D and E, removal of 

 both first chelae and posterior appendages from either the small, D, or great, E, 

 chela side, to determine the influence of the lateral amount of material on the regen- 

 eration of the first chelae; L. large chela stump; S, small chela stump. 



