30 PRELIMINARY REPORT 



Genus SEMOTILUS Eafinesque. 



Semotilus atromaciilatus (Mitchill). Horned-dace. Creek Chub. 



Body rather stout; liead large; mouth, large and broad, oblique; 

 generally a small barbel on the maxillary in mature specimens, not 

 distinguishable in small specimens. Color dark above, sides with a 

 black lateral band in the young, this disappearing with age; under 

 parts yellowish, tinged with red in the spring males; dorsal fin 

 small, with a black spot at its base in front, edged with red in the 

 male in the breeding seasons; a dark bar behind the opercles; 

 scales edged with dark dots; young with a small dark caudal spot; 

 snout in the males covered with tubercles in the spring. Scales 

 fine, 9-55-6, averaging 55 in the lateral line but varying from 50 to 

 60; 30 scales before the dorsal fin. Pharyngeal teeth 2, 5-4, 2. 

 Head contained 3f times in the length. Eye 5 in the head. 

 Dorsal fin inserted behind the ventrals, contains 7 rays. Anal 8. 

 Length 10 inches. 



A very common minnow in Minnesota. It has been taken at 

 every place where collections have been made. 



Genus LEUCISCI^S Cuvier. 



Leuciscus uaclitriel)! Cox.* 



Body rather heavy, not greatly compressed; back slightly 

 elevated, its curve a little greater than that of the belly; caudal 

 peduncle rather stout, its depth i the length of the head. Head 

 rather short, not any more compressed than the body, upper surface 

 slightly flattened; snout quite blunt in mature specimens, its length 

 1 1-6 times the width of the eye; mouth not very large, but little 

 oblique, lower jaw included, maxillary scarcely reaching to the 

 front of the orbit of the eye; eye small, contained 4 times in the 

 length of the head; pharyngeal teeth 2, 4-5. 2. Dorsal fin with 8 

 rays, its first rays inserted nearer the base of the caudal than the 

 tip of the snout, also slightly back of the ventrals; caudal fin 

 forked; anal with 8 rays, slightly smaller than the dorsal; ventrals 

 small, not reaching the vent by ^ their length; pectorals inserted 

 rather high, not reaching the ventrals by f their length. Scales 

 small, 12-72-0, lateral line complete on mature specimens, decurved, 

 the pores extending on the head in several lines, one passing back 



*Since the following description of this new species was written it vras found that there 

 would be considerable delay in the publication of the present report, consequently the de- 

 scription was printed in the report of the U. S. Fish Comm. for 1894, p. 605. (Dec, 1-i, 1896.) 



