122 



MARKETABLE BRITISH MARINE FISHES chap. 



Figs. 66 — 70. — Molluscs which commonly serve as food 

 for fishes. 66. Solen siliqiia, a Razor-shell. 67. 

 Solen ensis, another kind of Razor-shell. 68. 

 Mactra subtmncata, a common bivalve. 69. Scrohi- 

 cidaria, a smaller kind of bivalve. 70. The 

 common Squid. 



former grows to a length of 8 inches, the 

 latter to 3f inches. I found that the 

 small plaice landed at Grimsby in March 

 from grounds off the Sylt Island on the 

 German coast had been feeding almost 

 entirely on Solen, and it also forms a 

 considerable part of the food supply of 

 the same fish in the Firth of Forth. The same shell-fish is 



