of the Fishery Board for Scotland. 



169 



An examination of the two Tables shows that, as Brook pointed out, 

 moulting takes place more frequently in the summer months than in the 

 Avinter. Casting is not, however, confined to the warm months, but 

 occurs in every month of the year. 



That the protection afforded the crabs in confinement may have 

 stimulated growth is possible ; and while their frequent casting during 

 the first year may be due in some measure to the regular and certain 

 provision of food, still it has been assumed that the growth indicated by 

 the above specimens is not greater than that of the more favoured 

 individuals in the free state. 



In order to compare the frequency of moulting in different individuals, 

 Waddington's and Brook's specimens have been set out in Table III. In 

 it the month in which each moult took place and the resulting size of 

 the crab are shown. At the top of each series the authority for it is 

 indicated by means of a letter and number. B refers to Brook, and the 

 number or letter accompanying it relates to the form thus designated 

 in his paper in the Annals and Magazine of Natural History (V.) 14, 

 1884, p. 202 el seq. The others refer to the individuals particularised 

 in Table I. 



[Table 



