CATFISH GENUS NOTURUS RAFINESQUE 153 



to the third dorsal ray and midside; another lies between the adipose 

 and dorsal fins; a third, at base of adipose fin, variously extends into 

 the basal half or more of fin and to the distal margin in adults; a 

 very light bar of brown pigment crosses the caudal peduncle, ex- 

 tending onto the upper prociu-rent caudal rays; three light ellipses 

 separate the four dark dorsal saddles or blotches; a quadrate-shaped 

 light area lies between the first saddle and head; caudal fin usually 

 with two or more concentric brown bands covering most of fin, one 

 of which is submarginal; anal fin usually immaculate, infrequently 

 with scattered pigment; pectoral spine covered with brown chromato- 

 phores, the pectoral rays moderately pigmented near spine and 

 toward base. 



Specimens from the Green River system (pi. 12, fig. 1) usually 

 are somberly colored, lacking bold dark saddles, in contrast to the 

 prominent patterns of Duck River specimens (pi. 12, fig. 2). 



Type (pi. 12, fig. 1).— The holotype (UMMZ 167597) is a male, 

 44.1 mm. in standard length. It has 6 + 11 = 17 anal rays; on each side 

 there are eight soft pectoral rays, nine pelvic rays, eleven preoper- 

 culomandibular pores, two internasal pores, and seven serrae on the 

 posterior edge of the pectoral spine; the dorsal fin has five soft rays 

 and the caudal fin has 19+7+9 + 14=49 rays. The head length is 

 stepped into the standard length 3.85 times and the distance from 

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

 distance from the dorsal fin origin to the adipose notch 2.05 times. 

 Other measurements are given in table 28. 



Variation. — Vertebrae in 28 specimens from the Green, 42 from 

 the Barren, and 14 from the Duck River systems are 34 to 36, mean 

 35.07; 34 to 37, mean 35.83; and 34 to 36, mean 35.29, respectively. 

 The combined mean is 35.49. Other mean variational data are listed, 

 in order, for (a)48 Green River specimens, (b)48 from the Barren 

 River system, (c)14 from the Duck Riv^er system, and (d) the com- 

 bined samples; the ranges of variation are given in parentheses but 

 omitted if identical: internasal pores (a) 1.92, (b)1.86, (c)1.96, (d)1.90; 

 preoperculomandibular pores (a) (10-12) 10.98, (b) (10-12) 11.04, 

 (c)(10-ll) 10.82, (d)(10-12) 10.99; soft pectoral rays (a)8.22, (b)8.23, 

 (c)8.25, (d)8.23; pelvic rays (a) (8-10) 9.06, (b)(8-10) 9.02, (c)(9-10) 

 9.11, (d)(8-10) 9.05; anal rays (a) (49 specimens; 14-18) 15.73, (b) 

 (14-18) 15.81, (c) (16-19) 17.29, (d) (14-19) 15.96; soft dorsal rays 

 (a) (5-6) 5.94, (b)(6) 6.00, (cj(5-6) 5.86, (d)(5-6) 5.95; upper-half 

 caudal rays (a)(23-29) 25.92, (b) (24-29) 25.92, (c)(25-28) 26.21, 

 (d) (23-29) 25.95; lower-half caudal rays (a) (21-26) 24.06, (b) (20-26) 

 23.63, (c)(23-26) 24.00, (d)(20-26) 23.86; total caudal rays (a)(46-54) 

 49.98, (b) (46-55) 49.54, (c) (48-54) 50.21, (d) (46-55) 49.82. The anal 

 fin thus appears to be slightly longer and the color pattern is bolder in 



