40 PKELIMINAEY REPORT 



Genus HYBOPSIS Agassiz. 

 KEY TO THE SPECIES OF HYBOPSIS. 



A. Mouth inferior but horizontal; generally species of small size. 



B. Barbel very long for the size of the fish; front of the dorsal 

 fin behind the front of the ventrals; small species, 2^ 

 inches; body generally marked with black dots. byostomus, 40 



BB. Barbel conspicuous but not as large as B. compared to the 

 size of the fish; eye very large; front of the dorsal fin be- 

 fore front of ventrals; body not marked with black dots. 



storeriamis, 40 

 A A. Mouth terminal; front of dorsal fin a little behind the front of the 

 ventrals; snout long and blunt; may reach a length of 10 

 inches kentiickiensis, 41 



Hybopsis liyostonms (Gilbert). 



Color pale silvery, dotted with many small black spots. Body 

 slender and cylindrical; snout long and pointed, projecting con- 

 siderably beyond the mouth; mouth on the lower side of the head 

 and rather wide; maxillary barbels present and long; pectoral fins 

 large. Head 4 in length. Depth 5|. Eye 3^. Dorsal fins with 8 

 rays. Anal 8. Lateral line with 37 scales. Length 2| inches. 

 Not very common in the state. Twenty or more specimens have 

 been taken from the Blue Earth River at Mankato (Cox, 1891-2). 

 Hybopsis storeriamis (Kirtland). 



Sides, under parts, cheeks and opercles bright silvery; upper 

 parts greenish; an indistinct lateral band sometimes present; no 

 black spot at the base of the caudal fin and the fins never with red. 

 Body rather elongate, compressed, back a little elevated; head 

 short and broad between the eyes; mouth rather small, the lower 

 jaw not projecting; barbels prominent; snout much decurved, its 

 tip somewhat thickened. Head contained 4-^ times in the body. 

 Depth 4. Eye very large, inserted in the upper part of the head, 

 about midway between the tip of the snout and the posterior edge 

 of the opercle, about as wide as the length of the snout, contained 

 3 times in the head. Dorsal fin with its first rays inserted over the 

 first rays of the ventrals, contains 8 rays. Anal 8. Scales 5-42-4, 

 the lateral line decurved. Teeth 1, 4-4, 0. Length 5 to 10 inches. 

 Caudal fin deeply forked. Not very common in the state, accord- 

 ing to present information. Specimens have been taken in the 

 Red River of the North at Moorhead and Grand Forks (N. D.) ; Otter 

 Tail River at Breckenridge and Red Lake River at Crookston and 

 Grand Forks (Woolman, 1892, Report U. S. Fish Comm., 1893, p. 

 371). 



