102 BRITISH FISHERIES 



tO'-enforce its provisions and to exact penalties 

 for their contravention. The principal matters 

 embraced- by the by-laws in force in the fishery 

 districts are : 



1. Regulation of the forms and dimensions of 

 fishing nets and other apparatus, including the 

 restriction or prohibition of methods of fishing 

 which are regarded as objectionable ; 



2. Regulation of the seasons of the year during 

 which defined methods of fishing may be 

 practised ; 



3. Regulation of the sizes below which shell- 

 fish (molluscs and crustaceans, but not sea-fish) 

 may be removed from a public fishery ; 



4. The (nominal) prohibition of the discharge 

 into the sea of sewage and other substances re- 

 garded as detrimental to the health of sea-fish or 

 shell-fish, or the practice of sea-fishing. 



In order to carry out the provisions of these 

 by-laws, the local committees may appoint super- 

 intendents and fishery officers, and may provide 

 and maintain vessels for the purpose of marine 

 superintendence. 



The by-laws made by the local committees are 

 of course rather varied, since local conditions affect 

 the general nature of the administration differ- 

 ently in many places. Those of the Lancashire 

 and Western Sea-Fisheries Committee (abstracted 

 in Appendix IV.) illustrate very well their general 

 nature. Speaking generally, the by - laws are 



