Lake or Mackinaw trout are as voracious as pike. They are chiefly caught on Lake Huron with gill nets and hooks. Saginaw Bay appears to be a favorite resort with them. Some winters large quantities are caught in the Bay through the ice, with a decoy fish and spear. They spawn in the fall, generally in the bays and inlets. Average weight 5 lbs; large 75 lbs. Siscowits are mostly found in Lake Superior, and are preferred by some to any other kind. They are of the trout family, and for fat are unequaled; they are mostly taken in gill nets. They spawn in the fall, and are very superior for packing. They are also of some value for their oil. Common weight 4 pounds, length 16 inches. Large herrings are very good fish, found only in the straits and large lakes. They spawn in the fall; but few are caught. Average weight 1-3/4 pounds; common length 10 inches. In addition to the above the muskelonge--a large and delicious variety--black and white bass, rock bass, perch, sturgeon, and at least twenty other kinds, abound in our waters; a minute description of which we are compelled to forego. Whitefish are taken both spring and fall, chiefly the latter; spring is the season for pickerel; trout are taken at all seasons. Something over a year since some excitement was occasioned by a mode of fishing adopted by a party of fishermen on Detroit river, who stationed nets over a mile and a half in extent across the mouth of the stream, a proceeding that was not only calculated to destroy the value of the seine fisheries above, but which would ultimately have driven the fish out of the river altogether. A formidable opposition was of course arrayed against this unusual and unwarrantable proceeding, and the party found it expedient to desist, but the Legislature, which met shortly after, failed to pass an inhibitive measure. This action, or rather want of action, would have been considered extraordinary in a State less favored by nature. We have fortunately been able to procure estimates of the amount of the catch at all the various fisheries, together with other leading statistics; and with the view of imparting to the subject a more general interest, we include two or three points beyond the limits of the State. The estimates are furnished by gentlemen of intelligence and experience, and may be relied on as substantially correct: Sandusky fisheries, catch mostly sold fresh: Whitefish, valuation $50,000 Pickerel, bass, etc 40,000 Value of seines and fixtures 16,000 Paid for wages 37,000 Maumee River, pickerel, white bass, etc., etc., mostly sold fresh: Valuation $50,000 Seines and fixtures $15,000 Paid for wages 12,000 Maumee Bay and Monroe County, Michigan, white fish and pickerel: Valuation $20,000 Pounds, seines, and fixtures 9,000 Paid for wages 10,000 Detroit River, nearly all white: