186 U.S. NATIONAL MUSEUM BULLETIN 282, 



specimen is 100 mm. in standard length. Upper simple caudal rays 

 20 to 26, mean 22.2; branched caudal rays 14 to 19, mean 16.9, of 

 which 6 to 8, usually 7 or 8, mean 7.3 are in the upper half and 7 

 to 11, usually 9 or 10, mean 9.6 are in the lower half of the fin; lower 

 simple caudal rays 13 to 19, mean 16.4. Soft dorsal rays 6 (in 112) or 

 7 (1). Anterior serrae of pectoral spine large, numerous, often 30 or 

 more; posterior serrae 6 to 12, usually 9 or 10, mean 9.12. Ossified 

 pectoral radials solidly fused on eleven sides in seven specimens 

 cleared and stained; three sides have them variously fused. Vertebrae 

 anterior to the anal fin 12 (in 2) or 13 (5). 



Body color variegated; side rather plain, only moderately well 

 pigmented; head dark above; a dark band on the back of the head 

 extends onto the branchiostegal membrane and operculum; another, 

 under the eye, extends backward below the light postorbital spot to 

 the first on the operculum and forward to the snout; cheek pale; upper 

 barbels heavily pigmented; mental barbels and lower lip with scat- 

 tered pigment; lower surface of head immaculate; abdomen immacu- 

 late except for a poorly developed bridge of pigment just anterior to 

 the pelvic fins; no obvious round, brown chromatophores on abdomen; 

 pelvic fin blotched in large specimens, pigmented above and below 

 near base; pectoral fin blotched, edge immaculate; base of anal fin 

 dusky; anal fin frequently with two dark brown bands variously well 

 developed, one median, the other subterminal, edge immaculate. 



Behind a light grayish predorsal area, the basidorsal blotch or 

 saddle extends backward almost to the third dorsal ray, forward to 

 midway between the dorsal fin and head, and to below the lateral 

 line, its anterior edge irregular; predorsal light spots, such as are 

 found in stigmosus, are seldom present in the basidorsal saddle; the 

 dorsal fin with a dusky base, then some sparse pigment, an immaculate 

 area, and a subterminal dark brownish band, followed by a clear 

 light edge; membrane of dorsal spine, except over the tip, pigmented; 

 caudal fin with two distinct but rather narrow crescentic bands, 

 the subterminal band joining the median band above and below, and 

 passing as one onto the upper and lower procurrent rays, thence 

 across the caudal peduncle as a distinct broadened bar, rest of fin 

 pale; adipose fin moderately clear except for a broad, blackish blotch 

 extending at least three-fourths the distance to the fin margin and 

 turning shghtly backward; the blotch expands on the back near the 

 base of the adipose fin but does not contact the other blackish saddles; 

 another blackish blotch or saddle confined to the dorsal surface 

 between the adipose and dorsal fins; membrane over air bladder 

 grayish. 



Type.— Jordan and Meek (in Jordan, 1889, p. 351) listed USNM 

 39932 as type of Noturus Juriosus. The catalog book indicates that 



