INVESTIGATIONS IN MINNESOTA AND NORTH DAKOTA. 371 



appearance ou account of mucous pores. Specimens Irom Valley City are 

 exceedingly largo and fine in color, length 2 inches. ■Many of the females 

 contained ripe eggs. 



15. Notropisjejunus (Forbes). Pembina River at Nechc, 10 specimens; Red River 



of the North at Moorhead, 9; Red River of the North at Grand Forks, 6; 

 Forest River at Minto, common; Red Lake River at Crookston, 11, This is 

 a very liandsome minnow; body and caudal peduncle deep, with abroad 

 straight lateral stripe of silvery pigment, edged with a dark line above. 



16. Notropis hud.somus (Dewitt Clinton). Otter Tail River at Breckenridge, 1 



specimen ; Red River of the North at Moorhead, 5 ; Cheyenne River at Valley 

 City, 1; Mouse River at Minot, common; Red River of the North at Grand 

 Forks, common ; Red Lake River at Grand Forks, rare ; Park River at Graf- 

 ton, 1; Red Lake River at Crookston, rare. 



17. Pimepliales notatus (Rafiuesque). Otter Tail River at Breckenridge, rare; 



Cheyenne River at Lisbon, common; Cheyenne River at Valley City, plen- 

 tiful; Goose River at HilLsboro, rare; Buffalo River at Hawley, 2; Mouse 

 River at Minot, rare. This species was not taken in as great numbers as 

 P. promelas and is possibly not as generally distributed throughout this 

 valley, but is found in i)urer water and in clearer streams. 



18. Pimephales promelas Ralinesque. Maple River at Mapleton, 5 specimens; 



Buffalo River at Hawley, rare; Goose River at Hillsboro, abundant; Chey- 

 enne River at Valley City, common ; Forest River at Minot, common. Spec- 

 imens from Goose River have a small white parasite encysted just under the 

 skin. 



19. Rhinichthys cataractae dulcis (Girard). Cheyenne River at Lisbon, abundant ; 



Cheyenne River at Valley City, 24 specimens; Maple River at Mapleton, 

 common ; Buffalo River at Hawley, 75 ; Pembina River at Neche, 3 ; Forest 

 River at Minot, common; Red Lake River at Crookston,!. This species 

 thrives better, apparently, farther north than in the localities here given; 

 specimens from Red Lake and Majile rivers were very small. Specimens 

 taken farther north by Dr. Eigenmann were much larger. Our finest speci- 

 mens were taken from Cheyenne River; at Lisbon, N. Dak., these specimens 

 averaged 55 mm. in length, 11 mm. in depth, and were very plump and round. 

 Color, very dark above, with small round dark spots on sides, from lateral 

 line to belly ; caudal spot distinct, with part of caudal peduncle black. 

 Taken only in the swift ripples. 



20. Semotilus atromaculatus (Mitchill). Maple River at Mapleton, rare; Buffalo 



River at Hawley, 5 specimens; Pembina River at Neche, 10; Forest River at 

 Minot, 14. Specimens unusually small. 



21. Hybopsis kentuckiensis (Ralinesque). River Chub. Otter Tail River at 



Breckenridge, common; Cheyenne River at Lisbon, 7 specimens; Cheyenne 

 River at A^alley City, rare; Buffalo River At Hawley, 5; Maple River at 

 Mapleton, rare; Forest River at Minbt, 2; Red Lake River at Crookston, 14. 

 Not an abundant species in these waters — more rare than the preceding. 



22. Hybopsis storerianus (Kirtland). Otter Tail River at Breckenridge, 3 speci- 



mens; Red River of the North at Moorhead, abundant; Red River of the 

 North at Grand Forks, common; Red Lake River at Grand Forks, 3; Red 

 Lake River at Crookston, 10. Found only in large streams. It reaches a 

 length of 4 inches and is the largest minnow found in this region. 



23. Notemigonus crysoleucas (Mitchill). Cheyenne River at Lisbon, rare. Rare 



even in the northern part of the Mississippi Basin. 



24. Hiodon tergisus Le Sueur. Moon-eye. Red River of the North at Moorhead, 



common ; Red River of the North at Grand Forks, abundant ; Red Lake River 

 at Crookston, common. Common throughout the basin of the Red River of 

 the North and Lake Winnipeg. 



