Hardly of less scientific interest is the Port Jackson shark (Heterodontus).
The manufacture of cod-liver oil for pharmaceutical purposes is naturally somewhat limited, as Norway, Newfoundland, and latterly also Japan, are more favourably situated as regards the supply of fresh cod, but the technical liver oils (cod oil, shark-liver oil) are produced in very large quantities in Grimsby, Hull, Aberdeen, and latterly also on the west coasts of the United Kingdom.
Though fruit-trees will not bear there is an abundance of edible berries; the rivers and lakes abound with trout, perch, pike and other fish, and in the lower waters with salmon; and the cod, herring, halibut and Greenland shark in the northern seas attract numerous Norwegian and Russian fishermen.
To W.N.W.; the uninhabited ones, mere rocks and reefs, valuable only for their guano deposits and shark-fishing grounds, continue the chain several hundred miles farther W.N.W.
($12,940); shrimp, 306,500 lb ($ 12,452); terrapin, 27,521 lb ($5,580); mullet, 138,000 lb ($3782); jewfish, 79,500 lb ($373 8); channel bass, 102,000 lb ($355 0); squeteague, 85,700 lb ($3 0 59); shark, 90,000 lb ($1800).