FISHES OF MINNESOTA 67 



tained 4 times in the length. Depth 5 to 0. Eye equal to the length 

 of the snout, contained 4 times in the head. Dorsal tin XllI to 

 XY-11 to 13. Anal II, 8 to 10. Scales D-On to 80-17, cheeks with 

 very small scales; lateral line also straight; breast naked; back 

 of the neck sometimes naked; middle line of the belly with larj^e 

 scales, which soon droj) oil", leaving a naked space. Pyloric ca^ca 3. 

 Length 3 to 4 inches. 



Very common in the Minnesota Kiver at Mankalo, where a num- 

 ber of specimens have been taken (Cox, 1891-4); a few taken from 

 the Little Minnesota River and Big Stone Lake at Brown's Valley ; 

 Minnesota River at Ortonville, rare; Chippewa River at Monte- 

 video, common; Red River of the North at Moorhead, rare; Otter 

 Tail River at Breckenridge, not common (^Voolman, 1892, Report 

 U. S. Fish Comm., 1893, p. 372). 



Hadropterus guutlieri (Eigenmann & Eigenmann). 



General color yellowish; a series of large dark blotches along 

 the sides similar to those of H. aspro; upper parts mottled w'ith 

 black; dark lines before and below* the eye; a dark blotch on the 

 anterior and posterior portions of the dorsal fins. Upper jaw not 

 protractile; gill membranes little connected; middle line of the 

 belly with enlarged scales; lateral line complete; w^ell developed 

 teeth on the palatine bones; preopercle not serrate; back of the 

 neck and breast, except the median line naked; 3 series of large 

 scales on the cheeks and opercles ; opercle with a stiff spine. Head 

 contained 3 4-5 to 4 times in the length. Depth 5| to G. Dorsal 

 fin X-13 or 14. Anal II, 9 to 11. Scales 5-56 to 57-9. 



The only specimens known in Minnesota were taken in the Red 

 River of the North at Moorhead and Red Lake River at Crookston 

 (Woolman, 1892, Report U. S. Fish Comm., 1893, p. 373). 



Genus BOLEOSOMA De Kay. 



Boleosoma nigrum (Kafinesqne). Johnuy Darter. 



General color yellowish brown; upper parts marked with many 

 irregular darker lines; siden with 7 or 8 W-shaped markings, tliesi' 

 very characteristic of this darter; upper part of the head black in 

 spring males, in others dotted with brown; a black line extending 

 from the front of the eye toward the snout, a similar one sometimes 

 extending from the eye downward; fins barred with dark brown; 

 sometimes the whole anterior portion of the body is black in spring 

 males. Body elongate, somewhat cylindrical; head pointed, the 

 snout a little decurved, lower jaw not projecting beyond the upper. 



