496 CONTKIBUTIONS TO NOETH AMERICAN ICHTHYOLOGY — IV. 



cles scaly ; the cheek scales small and closely set ; a triangular series 

 of scales on temporal region ; throat smooth ; neck above closely 

 scaly ; belly closely scaled. Fins large ; spinous dorsal high, the 

 second still higher, but smaller than the first, its base about equal to 

 the length of the head ; dorsal fins contiguous, slightly connected. 

 Color olivaceous ; head above entirely black ; back with 8 dark cross- 

 bars ; about 11 bar-like blotches, somewhat indistinct, arranged along 

 the lateral line; fins chiefly black; membranes of the second dorsal 

 and ventral fins entirely black, that of the spinous dorsal with a broad 

 black horizontal bar at base, above which are numerous distinct black 

 oblique streaks ; anal with a broad black bar; caudal and pectoral fins 

 largely dusk3\ Females and young probably x)aler. Head 4^ ; depth 

 4J. D. XIl-lO; A. II, 7; Lat. 1. (not counted). L. 2J inches. Cum- 

 berland River; but one specimen known. 



{Arlina alrip'mms Jordan, Bull. U. S. Nat. Mus. 1877, 10; Jordan, Man. Vert. ed. 

 2,223.) 



775. IT. siinotera (Cope) Jordan. 



Body short and rather deep. Head small ; the snout very obtuse, as 

 blunt as in Diplesium. Cheeks, oiiercles, and breast scaly. Dorsal fins 

 well separated. Back and sides each with a series of quadrate blackish- 

 green blotches; belly saffron-color; upper iiarts sprinkled with red 

 spots ; first dorsal margined with orange-red; a row of oval red spots 

 across the middle of the fin ; second dorsal with the membrane chiefly 

 blood-red; a black spot on occiput and opercle; a dark stripe downward 

 and one forward from eye; caudal fin brown, barred. Head 5; depth 

 4. D. X-11 ; A. II, 7 ; scales 10-52-12. L. 3 inches. Headwaters of 

 the Tennessee and Cumberland rivers; an elegant and peculiar species, 

 carrying to an extreme the gobioid appearance of these fishes. 



(Hyostonia sinioteriim Cope, Jonrn. Acad. Nat. Sci. Phila. ISfiS, 215: Hiiostomasimoterum 

 Vaillant Recherclies, 100: Diplefiium, simotcrum Jordan, Man. Vert. ed. 2, 223.) 



257.— DIPI.ESIUITI Rafinesque. 



{Hyosioma Agassiz.) 



{Diplesion Rafiuesque, Iclitli. Oil. 1*20, 37; type Etheostoma hlcnnioides Raf.) 



Body elongate, subterete. Head very short and blunt, with tumid 

 cheeks; the profile very convex. Mouth small, inferior, horizontal. Pre- 

 maxillaries protractile, little movable, joined to the forehead mesially 

 by a slight frenum ; maxillary not protractile, adnate for most of its 

 length to the fleshy skin of thepreorbital; lower jaw very short; teeth 



