15 
DRG dat'y « f 
16. 
7. 
18. 
19. 
20. 
21. 
22. 
23. 
24. 
INVESTIGATIONS IN MINNESOTA AND NORTH DAKOTA. 371 
appearance on account of mucous pores. Specimens from Valley City are 
exceedingly large and fine in color, length 2 inches. Many of the females 
contained ripe eggs. 
. Notropis jejunus (Forbes). Pembina River at Neche, 40 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 handsome minnow; body and caudal peduncle deep, with a broad 
straight lateral stripe of silvery pigment, edged with a dark line above. 
Notropis hudsonius (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. 
Pimephales notatus (Rafinesque). 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 purer water and in clearer streams. 
Pimephales promelas Rafinesque. 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 asmall white parasite encysted just under the 
skin. 
Rhinichthys cataractz 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, 1. This species 
thrives better, apparently, farther north than in the localities here given; 
specimens from Red Lake and Maple 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. 
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. 
Hybopsis kentuckiensis (Rafinesque). River Chub. Otter Tail River at 
Breckenridge, common; Cheyenne River at Lisbon, 7 specimens; Cheyenne 
River at Valley City, rare; Buffalo River at Hawley, 5; Maple River at 
Mapleton, rare; Forest River at Minot, 2; Red Lake River at Crookston, 14. 
Not.an abundant species in these waters—more rare than the preceding. 
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. 
Notemigonus crysoleucas (Mitchill). Cheyenne River at Lisbon, rare. Rare 
even in the northern part of the Mississippi Basin. 
Hiodon tergisus L@ 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. 
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