: 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 
winter. 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 IIT. 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 et seg. The others refer to the individuals particularised 
in Table I. 
| ‘TABLE 
