It is more than likely that those between 0 9 to 2-1 1 24 mm. to 
58 mm.) represent without reference to sex the variation in growth 
at the end of the second year. This would give an average of 
SB'S mm. The group thus defined includes 4 “ berried ” females 
(B), but it is more than probable when we consider the size of 
the crab when impregnation would have occurred, that these belong 
to the end of the third year, which would thus include some at least 
of the crabs occurring between about 1-7 in. (44 mm ) and 2m in. 
(08 mm.). The average would in this case be 21 in. or 58 mm. 
The above figures in Table III. are expressed in graphic form in 
Chart IX., which indicates the relations of weight to size for 
males, M, females, F, and berried females, B. The curve is a very 
interesting one corresponding closely within limits to the logarith- 
mic curve, and shows that the relationship between size and weight 
is very uniform, and also that the increase of bulk when compared 
with such a measurement as the breadth of the carapace becomes 
more and more intensified. From this Chart 1 have been enabled to 
express approximately the growth with regard to weight in Table IV. 
TABLF. IV. — Carcinus inertias. 
Ago. 
Approx. No. 
of JScdysos. 
Moan. 
izo. 
Variation. 
Menu 
Sizr in 
Inches. 
Proportional 
Sate of 
Increase in 
Sise. 
Approx. 
W eight. 
Proportions! 
Rate of 
Increase in 
Weight. 
S months ... 
... 
mm. 
2*5 
mm. 
1 to 4 
A 
• •• 
Gramme* 
• •• 
ti 
... 
4 
2 to 0 
k 
... 
9 
... 
f! 
3 to 9 
i 
... 
... 
... 
1 year 
12—15 
9 
4 to 14 
k 
800 
1-5 
9 
1 year 3 mos. 
... 
15 
10 to 20 
t 
... 
... 
1 „ c „ 
... 
25 
15 to 35 
1 
... 
... 
1 „ 9 „ 
... 
32 
20 to 44 
4 
... 
... 
2 years 
6 — 7 
37 
24 to 50 
11 
300 
12 
700 
3 years 
1 . 2 or 3 
55 
42 to 68 
2$ 
50 
40 
230 
4 years 
1 or 0 
09 
55 to 83 
n 
25 
90 
125 
The progress in weight will be continuous between the moulting 
periods, but a loss takes place at the eedysis. This is evident from 
the differences in weight for a given size in the above figures 
(Table II.). 
