Charles Zeleny. 



sets separately it is found that the interval decreases from 2g.6 days 

 for the Cu set and 28.J days for the Sn set to 22.g days for the Sn + 

 Cu set. This result is represented on coordinate paper on p. 86, 

 Fig. 28. 



When two chelae are removed there is, therefore, a shortening of 

 the period between the first two moults as compared with the 

 cases where only one chela is removed. It will be seen that there 

 is only a slight difference between the moult period in the two 

 single chela cases. This result agrees perfectly with that obtained 

 for the time of appearance of the first moult in Gelasimus, where 



Table X. Alpheus dentipes. Time of Moulting. Cutting Chela {R or L) 



Removed. 



it was found (p. 83, ffl.) that the specimens with both chelae 

 removed in every case except one moulted before those with only 

 one chela removed. 



The greater disturbance of the normal condition of the animal 

 here again causes greater activity as regards the moulting period. 

 Starting with the smallest disturbance and going upward we have 

 a series ranging, respectively, through (i) cutting chela removed, 

 through (2) snapping chela removed, to (3) both cheke removed. 

 Correspondingly, the interval between the first and second moult 

 decreases from 29.6 days, through 28.7 days to 22.9 days for the 

 cases named. 



