WAV 3 1904 



The Periodic Growth of Scales in Gadidae 

 as an Index of Age. 



By 

 J. Stuart Thomson, F.L.S. 



(With Plates I.-VIII., and one Figure in the text.) 



I. iNTrvODUCTION. 



Tins work is a continuation of my preliminary paper on the same 

 subject, which was pubhshed in a former number of the Journal of the 

 Association (vol. vi., p. 373, January, 1902). 



I must firstly express my indebtedness to those who have aided mo 

 in my work. I am signally indebted to Mr. Garstang, wlio, about two 



NEW aEKIE.S. — VOL. VII. NO. 1. Al'llIL, 1904. A 



