BULLETIN OF THE UNITED STATES FISH COMiUSSION. 393 



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3. On the various metliotls of oyster culture, £15. 



4. On oyster culture in Scotland, including Orkney and Shetland, 

 specifying- the localities and the species and varieties of oysters most 

 suitable, and discussing the effects of the laws at present in force, £20. 



5. On the legislation at present applicable to the salmon fisheries in 

 Scotland, and the best means of improving it, £10. 



G. On the best means of increasing the supply of mussels for bait, in- 

 dicating the most suitable localities for mussel beds, £20. 



7. On the natural history of the herring, with special reference to its 

 migrations, £10. 



S. On the various means of curing and preserving fish at home and 

 abroad, £15. 



9. For the best description of the means used for curing and preserv- 

 ing the various kinds of fish caught on the coasts of Scotland, the Heb- 

 rides, and the Orkney and Shetland Islands, £15. 



10. On the pollution of rivers, indicating especially the kinds of pol- 

 lution injurious to fish life, £20. 



11. On the salmon disease, £10. 



12. On the migration of the Salmonidse as aifected by meteorological 

 and other influences, £10. 



13. Should there be a mesh fixed by law for herring nets, and, if so, 

 of what size; or should fishermen be at liberty to use any size of mesh 

 theyi)lease? £5. 



14. On the best method of preserving fish alive for markets, £15. 



15. On the artificial propagation of sea-fishes suitable for food, £10. 



16. On the breeding and rearing of fresh-water fish, £10. 



17. On the species of foreign fish most suitable for introduction into 

 British rivers and waters, £15. 



18. On the utilization of fish-offal, £10. 



19. On the fish supply of great cities, with special reference to the 

 best methods of packing and distribution, and other means calculated 

 to facilitate the delivery of the fish in good condition for market, £20. 



20. Ou the herring brand, £10. 



21. On the food of fishes, both in fresh and salt water, accompanied 

 by illustrations and preparations, £15. 



22. On the natural history and habits of fresh-water trout, with 

 special reference to the institution of an annual close time in Scotland, 

 and the expediency of adopting a rod license, £10. 



23. On the migration and spawning of sea-fish suitable for food, £10. 



24. On angling associations, with code of rules for their management, 

 £10. 



25. On the relations existing between the annual migrations of sea- 

 birds and the migrations of fishes, £10. 



26. On the best modes of preserving ice, £10. 



In addition to the above prizes, medals and diplomas granted by gov- 



