146 Bulletin 4y, United States National Museum. 



Subgenus SCHILBEODES. 

 223. SCHILBEODES GYRINUS, (MitcUill). 



Body comparatively short and thick. Head large, its width 3^ to 4^ in 

 length of body ; depth 4 to 5i; head 3i to 4. Spines stout and rather 

 long ; that of the pectoral fin straight, not serrated, grooved behind, 2^ in 

 the distance from snout to dorsal fin. Dorsal higher than long, inserted 

 nearer anal than snout. Anal 13. Jaws nearly equal. Humeral process 

 short. Nearly uniform yellowish brown, sometimes blackish, without 

 transverse blotches ; a narrow dark lateral streak and 1 or more dorsal 

 ones. L. 5 inches. Hudson River and westward through almost the 

 entire Mississippi Valley, and upper lake region; rather common, espe- 

 cially northwestward ; the western specimens more robust and perhaps 

 distinguishable as var. sialis. {yvptvhg, tadpole.) 



Siliirn.i gyrinus, Mitchili,, Amer. Month. Mag., 1818, 322, Walkill River, New York. 

 Notunis gyrhws, Jordan, Bull. U.S. Nat. Mus., x, 102, 1877. 



Noltinis sialix, Jordan, Bull. U. S. Nat. Mus., x, 102, 1877, White River, Indiana. 

 Notuj^s gyrimis, Jordan & Gilbert, Synopsis, 98, 1883. 



224. SCHILBEODES LEPTACANTHUS, (Jordan). 



Body slender, the head small and narrow, longer than broad. Eye 

 small. Upper jaw much projecting. Spines very short and slender; that 

 of the dorsal not i the height of the fin ; all less than J the length of the 

 head ; that of the pectoral retrorsely serrate on the outer edge, entire 

 within. Head 4f in body ; its width 5i ; depth 5+ ; distance to dorsal 2* ; 

 pectoral spine 5 in this distance ; dorsal nearer anal than snout. Anal 14. 

 Humeral process very short. Color yellowish, somewhat mottled. L. 3 

 inches. Gulf States in sandy streams ; scarce, known from the basins of 

 the Ogeeche, Alabama, and Pearl rivers. {Tie-ru^, slender ; uKuv&a, spine.) 



Noturua leplacanlhns, Jordan, Ann. Lye. Nat. Hist. N. Y., 1876, 352, Silver Creek, branch of 



Etowah River, Rome, Ga. 

 Xolurun leptacanllms, JORDAN, I. c, 102, 1877. 

 Notunis hplacanthtts, JoBDAN & Gilbert, Synopsis, 98, 1883. 



Subgenus RABIDA, Jordan & Evormann. 



225. SCHILBEODES NOCTURNUS, (Jordan A- Gilliert). 



Head 3|. A. 15 or 16. Rather robust ; head moderate, little depressed, 

 eyes small; barbels short, barely reaching gill oi)ening; pectoral spine 

 short, 2 in head, its inner margin with short, sharp teeth at base (entire 

 in specimens from the lower Wabash); its outer margin with a few points 

 near tip, otherwise entire; adipose fin high, continuous with caudal; anal 

 high. Color very dark brown, everywhere dotted with black; finsdusky 

 with narrow pale margins. L. 3 inches. Sandy streams, among weeds, in 

 Lower Mississippi Valley, known from the lower Wabash in Indiana, and 

 from the Poteau, Washita, and Saline rivers, Arkansas, {nocturniis, noc- 

 turnal, from its black color.) 



Noturus noctumus, Jorpan & Gilbert, Proc. U. S. Nat. Mus., 188(1, G, Saline River, at Benton, 

 Ark an sas . (Type, 36461. ) 



