SEA-FISHERIES LABORATORY. 203 



a part of the surface waters where the copepoda are quite 

 different from its previous meal, and begin to feed again. 

 In this way one would get a selection of copepods which 

 might or might not be represented in the area tow-netted. 

 The following photographs show the food found in 

 the stomachs of two of the marked fishes, when 

 re-captured. 



One is a flounder (LL86) caught on Baicliff sands, 

 on May 26th, 1906. The food consisted mainly of Tellina 

 halthica, with a few cockles, and two Hydrobia ulvce. The 

 fish weighed 272 grammes. The clean dried shells 



weighed 1P82 grammes (see Plate VI.) . 



The other is a plaice (LL.78) caught on Baicliff sands 

 on June 2nd, 1906. In this case the food consisted of 

 cockles only. The fish weighed 221 grammes, and the 

 clean dried shells 11*5 grammes (see Plate VII.) . 



Besides those illustrated we have noted the 

 following: — LL117, caught on the Barrow sands on 

 July 3rd, 1906. The food was mainly Tellina halthica, 

 with a few Corophium (an isopod) and the remains of one 

 small shore crab. LL896, flounder, caught in the 

 Duddon, near Askam, on July 18th, 1906. The food 

 consisted of Tellina halthica, and cockles, in equal 

 quantity. A lesser sand eel caught in Ulverstoii 

 Channel on May 24th, 1906, had four transforming plaice, 

 six Corophium four Mysis, and a large number of 

 Gammarus in its stomach. 



Plate VI. 

 Contents of stomach, etc., of flounder (LL86). Photo- 

 graphed natural size. 



Plate VII. 

 Contents of stomach, etc., of a plaice (LL78). Photo- 

 graphed natural size. 



