4AD4 ep in Alia BNG 
20. Repekr, H. C. Bericht iiber die hollandische Schollenfischerei und 
iiber die Naturgeschichte der Scholle in der siidlichen Nordsee. 
Verhand. Rijks. Instit. v. onderzoek der Zee. U1, 5. 1909. 
21. Reitpiscu, J. Eizahl bei Pl. platessa und die Altersbestimmung 
dieser Form aus den Otolithen. Wiassensch. Meeresunters. N.F. 
Boat Kiel! 1899: 
22. THompson, Stuart. The Periodic Growth of Scales in Gadide as 
an index of Age. Journ. Mar. Biol. Assoc. VI, 1902, and VII, 
1904. 
23. Wautuace, W. Mar. Biol. Assoc. International Investigations. 
Report I (1902-03) [Publ. 1905] ; 
Report I (1904-05) Pt. I [Publ. 1907] ; 
Report H (1904-05) Pt. IL [Publ. 1909] ; 
Report IT (1906-08) [Publ. 1911]. 
24. Watiacr, W. Report on the Age, Growth and Sexual Maturity of 
the Plaice in certain parts of the North Sea. Bd. of Agric. and 
Fisheries. Fishery Investigations. Ser. Il. Vol. I. No.2. 1915. 
25. Winer, O. On the Value of the Rings in the Scales of the Cod as a 
means of Age Determination. Illustrated by Marking Experi- 
ments. Medd. Komm. Havunders. Fisk. IV. No. 8. 1915. 
For further references to the literature of the subject see : 
Dant, kK. The Assessment of Age and Growth in Fish. Internat. Rev. 
Hydrobiol. and Hydrogr. U1, 1909, p. 758. 
British AND Metric MEASURES. 
To convert millimetres to inches multiply by -039. 
centimetres —,, % Pe OO: 
The following equivalents will be useful in reading this paper :— 
1 mm.= 3; inch. 
2 
) 10 
6 =1 
13 =A 
lL em“ inen. 25:4 em. = 10 inches. 
2:5) 0s te SOD 7s = 1D ore 
5... == aamehes: 30 One ile 
10. -,. (a 40-6 ,, = 16 
152) ae 50:8 ,, = 20 
203 ,, =8 ,, 100g p= 239 
