D.— APPARATUS ENTIRELY AUTOMATIC. 



VI.— TRAPS. 



20. Pen traps. 



pocket traps. 

 Fish-slide or trap. 



Model, scale 1 inch to the foot. Made of wooden slats set in a slop- 

 ing frame, with box at upper end. Length, 10 inches; width, 

 4£ inches. James Eiver, Virginia, 1876. 25,831. Gift of J. 

 It. Adam. " The fish slides in the Eoanoke River, North Caro- 

 lina, are solid and substantial structures built of timber, and 

 are placed in the strongest currents just below the falls. The 

 shad, seeking the headwaters of the stream in endeavoring to 

 find their way above the falls, get into the currents and are 

 at once washed upon the screen of the slide, which slants up- 

 ward from the bottom of the river. The power of the current 

 effectually prevents their return, and they are easily secured, 

 either in the box or on the screen of the slide." 



Fish- slide or trap. 



Model, scale 1 inch to the foot. A series of wooden slats set in a 

 sloping frame. Length, 10 inches ; width, 4£ inches. James 

 River, Virginia 1876. 25,830. Gift of J. G. Adam. "A slide of 

 this kind is set in the current of a shallow stream, its upper 

 surface raised from the bottom at an angle of 25 to 30 degrees, 

 the lower edge, which comes in contact with the water, facing 

 up stream, and the top edge reaching above the water.*' 



Fish-trap or slide. 



Model. Made of wooden slats in three series, each 8 inches long, 

 set in frame. Charlottetown, Md., 1877. 57,045. Gift of J. 

 B. Graham. 



labyrinth traps. 



FUNNEL TRAPS WITHOUT WINGS OR LEADERS. 

 Fish-traps. 



Fish- trap. 



Made of fine splints; cone-shape; two funnels. Length, 5 feet; 

 diameter at large end, 14£ inches. 'Baltimore, Md., 1880. 

 56,946. U. S. Fish Commission. Used in Cheaspeake Bay 

 and adjacent waters. 



[193] 1017 



