BuL. U. S. B. F., 1908. 



Plate CUI. 



A Penobscot River salmon weir. Large numbers of these traps are set in the Penobscot during the short 

 season, and they intercept practically the entire run of salmon. The fish thus caught are the sole source 

 of eggs for the hatchery on Craig Brook, a small tributary of the Penobscot. (See p. 1399.) 



I^ar^rst seine in Uic wnrM. Tliis seine, upe rated fur sliad and a lu wives at SLuny Point, Virginia, on the Potomac 

 River, was the longest net of the kind. The net proper was y,6.)o feet in 'length, and the hauling ropes at 

 the ends were 22,400 feet long, giving 32,000 feet as the total sweep of the seine, only one end of which shows 

 in the illustration. The seine was hauled by steam power and the labor of So men, and was drawn twice 

 daily, at ebb tide, throughout the season. As many as 3,600 shad were taken at one haul, and 126,000 in one 

 season, and 250,000 alewives were caught at one time. Recently the season's yield of shad fell to 3.000, and 

 the fishery was consequently discontinued in 1905 after having been carried on for a century. This seine 

 was a source of eggs for the Bureau's shad hatchery on this river. (See p. 1399.) 



