222 Bulletin 47, United States National Museum. 



Leucosomus rhotheus, COPE, Proc. Ac. Nat. Sci. Phila., 1861, 523, Brandy wine Creek and Ran- 



cocos Creek, tributaries of the Delaware River. 



Squulius lyalope, COPE, Proc. Ac. Nat. Sci. Phila., 1864, 280, Conestoga River, Pa.; young. 

 Cheilonemus pulchellus, STOKER, Fishes Mass., 286, 1867. 

 Leucosomus pulchellus, GUNTHER, Cat., vn, 268, 1868. 

 Semotilus bullaris, JORDAN & GILBERT, Synopsis, 222, 1883. 



Subgenus SEMOTILUS. 

 355. SEMOTILUS ATROMACULATUS (Mitchill). 



(HORNED-DACE ; CREEK-CHUB.) 



Head 3f ; depth 4 ; eye about 5. D. 7 ; A. 8 : scales 9-55-6, those in 

 lateral line varying from 50 to 60 or even more, the number greatest in 

 northern examples ; teeth 2, 5-4, 2. Body stout, the dorsal outline arched 

 in front of the dorsal, the body tapering backwards from a point consider- 

 ably in advance of the dorsal, so that the base of that fin is oblique. 

 Head large and heavy, broad and rounded above ; snout broad; mouth 

 broad, oblique, lower jaw slightly included, the upper lip just below 

 level of pupil ; maxillary barely reaching front of pupil ; maxillary bar- 

 bel small, not evident in specimens of less than 2 or 3 inches in length. 

 Eye rather small. Scales small, considerably crowded, and reduced 

 anteriorly; about 30 series in front of the dorsal fin. Lateral line consider- 

 ably decurved. Fins small ; the dorsal well behind ventrals, inserted 

 behind fifteenth vertebra, its last ray well in advance of base of anal. 

 Color dusky bluish above; sides with a vague, dusky band, black in the 

 young, disappearing in the adult; belly creamy, rosy-tinted in males 

 in spring ; dorsal fin always with a conspicuous black spot at the base in 

 front, which is bordered with red in the male; a dark vertebral line; 

 scales everywhere edged with dark punctulations ; a dusky bar behind 

 opercle ; males with snout coarsely tuberculate in spring. Young with a 

 small black caudal spot. Length 10 inches. Maine (Freeport; Kendall 

 Smith) and western Massachusetts (Housatonic River, Jordan), to 

 southern Missouri, Wyoming, and Canada; everywhere abundant; 

 chiefly in small brooks, where it is often the largest and most voracious 

 inhabitant, (ater, black; macula, spot.) 



Oyprinus afromaculatus, MITCHILL, Amer. Monthly Mag., 11, 1818, 324, Wallkill River. 



Semotilus dorsalis, BAFINESQUE, Ichth. Oh., 49, 1820, Kentucky River. 



SemotUus cephalus, BAFINESQUE, Ichth. Oh., 49, 1820, Ohio River. 



Semotilus diplemius, BAFINESQUE, Ichth. Oh., 49, 1820, Ohio River. 



Leuciscus iris, CUVIER & VALENCIENNES, Hist. Nat. Poiss., xvn, 255, 1844, New York and Caro- 

 lina. 



Leuciscus storm, CUVIER & VALENCIENNES, xvn, 255, 1844, New York. 



Leuciscus p.ulchelloides, AYRES, Proc. Bost. Soc. Nat. Hist., 1849, 157, Connecticut. 



Leucosomus pallidtis, GIRARD, Proc. Ac. Nat. Sci. Phila., 1856, 190, (lateral line 52), Antelope 

 Creek, Arkansas. (Coll. Kennedy.) 



Leucosomus incrassalm, GIRARD, 1. c., 1856, 190, (lateral line 64), Choctaw Agency. (Coll. 

 Mb'llhausen.) 



Semotilus macrocephalus, GIRARD, 1. c., 1856, 204, Fort Pierre, Nebraska. (Coll. Evans.) 



Semotilus fpeciosus, GIRARD, I. c., 1856, 204, Sweetwater River, Nebraska. (Coll. Bowman.) 



Semotilus hammondi, ABBOTT, Proc. Ac. Nat. Sci. Phila., 1860, 474, Kansas. (Coll. Hammond.) 



Semotilus corporalis, JORDAN & GILBERT, Synopsis, 221, 1883 ; COPE, Cyp. Penn., 363, 1866 ; not 

 Oyprinus corporalis, MITCHILL. 



Leucosomus corporalis, GUNTHER, Cat., VIT, 269, 1868. 



Bemotilus atromaculatus, BICKNELL & DRESSLAR, Proc. Ac. Nat. Sci. Phila., 1885, 16. 



