INVESTIGATIONS IN MINNESOTA AND NORTH DAKOTA. 365 



trematodea appearing as black dots about the size of a piuliead. Others 

 were affected by what seemed to be a small white worm encysted just 

 under the skin. 



Mouse River, Mi not, ¥. Dak., August 6. — This station is located just 

 where the ground begins to rise into the foothills of the mountains. 

 The stream flows through a valley one.-half to three-fourths of a mile 

 wide, lined on either side by eroded and rounded hills from 50 to 75 feet 

 high. The stream will average 10 yards in width and from 2 to 2h feet 

 in depth. The bed is of drift stones, coarse gravel, and mud, the 

 latter always supporting a growth of vegetation, of mints, grasses, 

 or rushes. The stream is a good one for fish; while the water is not 

 clear, it has only enough sediment to cause it to look cloudy in the 

 deeper places. There are numerous ripples in the stream over which 

 the water runs at the rate of 3^ to 4 miles per hour. Several species 

 of fl^shes are common. Black suckers are reported as being especially 

 abundant during the sirring and fall rises. Crawfish were taken by 

 hundreds at almost every haul of the seine; a few clam shells were also 

 observed. Univalves and the small crustaceans were rare, as were 

 also alga; and other vegetation living entirely in the water. 



Englisli Gooley, Grand Forks, N. Bale., August 10. — The English Cooley 

 is a small drain 2 miles west of Grand Forks. During a greater part 

 of the year it has no current whatever. The banks are low and the 

 water is filled with vegetation. It contained a few species of fishes, 

 crawfish, and water insects. The predominating fishes are Gatostomus 

 teres and Plmephales notatus, both covered with parasites. The mud 

 in the bottom of the stream was deep and the water at the bottom very 

 clear. 



Bed Lake River, Grand Forks, N. Dak., August 12. — This is the largest 

 eastern tributary of the Eed River of the North, and is diflerent in 

 many respects from the other tributaries of that stream. It drains 

 Red Lake, a double lake 600 square miles in area, lying in the northern 

 part of Eed Lake Indian Reservation. The general course of the river 

 is west, although it makes two great curves. Unlike most other streams 

 of this region, this river starts toward the northwest and continues 

 thus until more than half the distance from the lake to the Red River 

 of the North is covered, then it turns suddenly toward the south and 

 southwest and then again takes a northwesterly direction, which it 

 pursues until it joins the Red River of the North. Another stream, 

 Clearwater River, rising south of Red Lake, follows the same general 

 direction as Red Lake River. Red Lake River is nearly as wide as the 

 Red River of the North, but much more shallow. It is very rapid and 

 the waters are of a reddish tinge. This difference in the color in the 

 waters of these two rivers is very marked, especially when the Red 

 Lake River mixes its waters with the whiter waters of tlie Red River 

 of the North. 



The bed of the river is of clean sand, a feature with which we do 



