Jordan and Evermann. Fishts of North America. 1051 



Indiana and south west ward to Arkansas;* known from the lower Wabash 

 and tributaries (Evermann), Green River, Kentucky, and Black, Poteau, 

 and Washita rivers, Arkansas ; locally common, (histrio, a harlequin.) 



'wo. (Ulocentra) histrio, JORDAN & GILBERT, Proc. U. S. Nat. Mas., 1887, 47, Poteau River, 

 near Hackett City, Arkansas; Saline River at Benton, and Washita River at 

 Arkadelphia, Arkansas. (Type, Nos. 36386, 36409, 36448. ColL Jordan & Gilbert.) 

 Jom.t hufrio, JORDAN, Bull. U. S. Fish Comm., viu, 1888, 164. 

 Ulocentra hittrio, BOCLEXGEB, Cat., i, 98. 



1441. ULOCEXTBA SIMOTERA (Cope). 



Head 4 to 4* : depth 4 to 5 ; eye 31 in head ; D. X to XII-10 or 11 ; A. 

 II. 7 : scales 6-48 to 52-11. Body short and rather deep. Head small ; 

 the snout very obtuse with strongly curved profile, almost as blunt as 

 in Diplt*ion blennioides. Cheeks, opercles, and breast naked or partly 

 scaly. Dorsal fins well separated ; pectoral a little longer than head ; 

 lateral line complete. In life pale green, the dark markings green; 

 various scales on back bronze-red in center, the neighboring scales light 

 yellow, the bronze markings forming very irregular streaks; belly pale 

 yellow, more or less flushed with bright orange; spinous dorsal pale at 

 base, then a black streak, then pale, each membrane with an orange spot 

 throughout the pale streak, the first two spots of a brilliant scarlet ; 

 edge of the fin snuffy brown ; soft dorsal with the rays pale yellowish, 

 the membranes spotted with bronze brown, a black spot at base of each 

 ray: caudal yellowish, with three wavy black bars; anal and ventrals 

 pale yellowish ; pectorals yellowish, faintly barred ; head with various 

 green markings ; a dark stripe downward and one forward from the eye. 

 Length 3 inches. An elegant and peculiar species, carrying to an extreme 

 the gobioid appearance of these fishes. Western Virginia, eastern Ken- 

 tucky and Tennessee, in the basins of the Green, Cumberland, and Ten- 

 nesee rivers, southward through Alabama to the Escambia River ; very 

 abundant in clear rocky or sandy streams ; one of the handsomest of the 

 small darters, (at/iortpa, comparative of a*/z6f, snub-nosed.) 

 Hyostoma simoierum, COPE, Journ. Ac. Nat. Sci. Phila., 1868, 215, Holston River and its 



tributaries; VAiLtAXT, Recherches, 100, 1873, with plates. 

 Ulocentra simotera, JORDAN & GILBERT, Synopsis, 495, 1883; BOULEKGER, Cat., i, 97. 

 Arlina alripitmisj JORDAN, Bull. X, I >. Nat. Mas., 10, 1877, tributary of the Cumberland 



River, near Nashville, Tennessee. (Type, No. 20433. Coll. A. Winchell.) 



*The following description is taken from the specimens from Black River, Black Bock, 

 Arkansas, belonging to Ulocentra hutrio, (Coll. 8. E. Meek): 



Head 4%; depth 5%; eye 4; snout 3%; D. IX-9; A. II, 7; scales 6-56-7, lateral line complete; 

 cheek-* and opercles nearly naked, a few scales on their npper parts; nape scalfed; breast and 

 anterior portion of belly naked. Body rather robust, similar in form to P-tcilichthy* zonalu. Head 

 heavy; snont short, sharply decurred; month small, horizontal, the lower jaw included; npper 

 jaw with a slight frenum, premaxillaries slightly protractile; gill membranes broadly united; 

 teeth in jaws well developed. Fins rather high; pectorals large, their tips reaching part tips 

 of ventrals. Color dark olivaceous, much mottled with darker: six dark dorsal blotches; top of 

 head and base of caudal black; spinous dorsal with a broad dark margin across top of spines and 

 downward on first memhraue; all the other flns irregularly barred and dotted with black or 

 dark brown; a dark vertical bar above base of ventral; a series of dark spots on postocular and 

 a dark line downward from eye; snont and lower parts of head with some spots. 



t The description of this form is substantially as follow*: 



H^entra airipitmu (Jordan). Head 1%; depth 4%. D. XII-10 or 11; A. II, 7. Body rather 

 short, somewhat compressed behind. Head extremely short and deep, the snont very short and 

 abruptly rounded, as in Ulocentra rimutera. Eye large. Gill membranes broadly united. Month 



