30 PKELIMINAEY EBPOET 



Genus SEMOTILUS Eafinesque. 



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



Body rather stout; head 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 vith a 

 black lateral baud 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 3| 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 LEUCISCUS Ouvier. 



Licucisciis nachtriebi 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 ^ 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 fln 

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

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

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

 small, 12-72-9, lateral line complete on mature specimens, decurved,-. 

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



•since the following description of tUs new species was written It was found that there 

 •would be considerable delay in the publication of the present report, conseauentlv the de. 

 scrlptlon was printed in the report of the U. S. Fish Comm. for 1894, p. 605. (Deo 14 1896 ) 



