— 109 — 
by the movement of the water. During the period of developement, therefore, to the 
larva and young fry stages, their locality is constantly shifting, and the area of distri- 
bution of the whole mass of fry is soon found to lie within geographical limits entirely 
Fig. 72. Extreme limits of distribution of the youngest stages of cod 
I. Newly spawned eggs. 
II. Larvæ and small fry, June. 
III. Young fish, Aug.—September 1900. 
distinct from those of the spawning grounds. It was natural that the fishery investiga- 
tions should attempt an examination of these passive movements of the various stages 
of developement, since the study of this question might well be expected to furnish, 
