142 U.S. NATIONAL MUSEUM BULLETIN 2 82 



The soft dorsal rays are six in all specimens. The caudal fins of these 

 specimens all have 15 branched rays with 7 rays in the upper half and 

 8 in the lower half. The upper simple caudal rays are 16 (in 3), 17 (1), 

 or 18 (1) and the lower simple caudal rays are 13 (3) or 14 (2). The 

 foDowing branchiostegal counts from the right side of specimens were 

 made without staining or dissection of the elements and thus may be 

 low: 9 (in 1) or 10 (2) ; the gill rakers on the first arch range from 5 to 

 8; as judged from x-rays the 6 hypurals are variably fused or lack 

 fusion distally. The individuals range from 42.7 to 49.4 mm. in stand- 

 ard length. 



The specimens are all of a medium brown color (perhaps faded) and 

 without prominent saddles or blotches but moderate blotches as 

 follows: top of head along midline and an area bounded by the pos- 

 terior margins of the eyes and anterior nares darker brown; a narrow 

 dark saddle, about as wide as eye length, extending from just anterior 

 to dorsal spine back to the third or fourth dorsal ray; another about as 

 wide, but lighter, extends from the dorsal fin to the adipose fin; and 

 a very narrow dark saddle at the base of the adipose fin projects as a 

 faint dark area into the adipose fin, perhaps to the margin; faint yel- 

 lowish areas on back at rear base of dorsal fin, and at both the anterior 

 and posterior bases of the adipose fin. Body and head otherwise appear- 

 ing medium brown, lower surfaces lighter. The medium brown effect 

 resulting from numerous rather large brown chromatophores over a 

 yellowish background ; large prominent dark brown or black chromato- 

 phores scattered on side of head and cheek; abdomen, lower head, and 

 pelvic fins yellowish, immaculate. Faint brown pigment on rays, at 

 least distally, of dorsal fin, anal fin, and upper side of pectoral fins; 

 dorsal and pectoral spines and dorsal rays, near base, rather heavily 

 pigmented ; caudal fin almost uniform light brownish, or perhaps with 

 a slight darkening near ends of rays; aside from the faint blotch, 

 adipose fin yellowish; lower barbels immaculate; upper barbels, 

 brownish. 



Type.— The holotype (pi. 11, fig. 1), USNM 201602, is a male 45.8 

 mm. in standard length. It has 6 soft dorsal rays, 4+9=13 anal rays, 

 and 18+7+8+14=47 caudal rays. On each side there are eight pelvic 

 rays, eight soft pectoral rays, one internasal pore (abnormal), and 

 eleven preoperculomandibular pores. The head length is stepped into 

 the standard length 3.45 times and the distance from the rear end of 

 the adipose fin to the tip of the caudal fin is stepped into the distance 

 from the dorsal origin to the rear end of the adipose fin 2.0 times. 

 There are four posterior serrae on the left pectoral spine and five on 

 the right. Measurements are given in table 28. 



Distribution. — Noturus baileyi (map 9) is known only from Abrams 

 Creek, Great Smoky Mountains National Park, a tributary to the 

 Little Tennessee River, Tennessee. 



