62 
sufficient have been obtained to show that in June, July, or even as 
late as August, they group themselves about 8 in., say 20 cm. 
These would appear to be just over three years old. The results 
from the marking of this species are practically of no use to indicate 
the rate of growth, although it may be said to be similar to, but less 
rapid than that of the plaice. 
Growth of the Turbot. — So few turbot are obtained that it is 
impossible to state the rate of growth from captures by the trawl. 
One series, however, got in August, 1903, at Skate Roads, points to 
a stage of about 24 cm. When all the results are added together, 
for the total number of years, hints at stages of about 9 and 11 in. 
begin to emerge, or say about 22-5 and 28 cm., and other stages of 
82-5 and 36 cm. may be distinguished. 
One of the turbot liberated on August 2, measuring 29"8 was 
free for 127 days, and during the period increased in length to 32-8 
cm. Another, which I did not see, however, when it was captured, 
was said to have grown from 28-1 to 30*5 in 38 days. When plotted 
out the former at least lies on a line parallel to that joining the 
points above mentioned. 
The growth during the first year is variously stated by the 
different observers, some showing it to be very rapid, and others to 
be slow. Two specimens which were in the Cullercoats laboratory, 
obtained in August, 1899, near the fish quay at North Shield:;, 
measured each l j| by in. (length = 4-1 cm.) and weighed 1-38 
and 1-52 grs. respectively. Another caught in December, measured 
4| by 3J in. (length = 11-4 cm.), and weighed 20-9 grs- All three 
have already been used in giving points on Chart 4. If the turbot's 
life be assumed to begin on June 30th, it is difficult to think that 
both of these stages belong to the first year, and it is more than 
probable that the smaller have just entered upon the second year, 
and the larger is in the middle of that year. The general trend of 
growth m the turbot would thus appear to be : — 1 year, ca. 5 cm.; 
2 years, ca. 18 cm.; 3 years, ca. 27 cm.; 4 years, ca. 32-5 cm.; 5 
years, ca, 37'5 cm. 
