a 
given above, or by measuring the length of the torfisk, and calculating its length when 
alive. By means of a great number of measurements, I have found that the distance 
from the forepart of the pectoral fin to the extremity of the root of the tail, multiplied 
1% times, gives the approximate length of the live fish. (Fig. 94). 
9” 50-100 100-200 200-400 400-600 Over 600 AA 
Fig. 95. Curve showing the average weight. 
By employing both of these methods, the curve shown in Fig. 95 was obtained, 
illustrating the relation between the different size groups and their dried weight. It 
appears, that the 
50—100 gr. class corresponds to the lengths of 33—42 cm. 
100—200 » » » » 42—52 » 
200—400 » » » » 52—67 » 
400—600 » » » » 67—83 » 
over 600 » » » » over 83 » 
fresh, whole fish. 
We can now again compare these trade classes with the groups for whole and gutted 
weight, as well as the age classes. The results of such comparison will be found in the 
following table, which may perhaps also be of value for other purposes than that immed- 
