70 U.S. NATIONAL MUSEUM BULLETIN 282 



pahoa Parish), 6153 (Richland Cr., 7 mi. NE. Norwood, East Feliciana Parish), 

 14072 (stream, Hwy. 10, 1.4 mi. W. Darlington, Saint Helena Parish), 14076 

 (stream, U.S. Hwy. 51, 1.4 mi. N. Kentwood, Tangipahoa Parish). Mississippi: 

 CU 11619, 11851, 12580, 15627, 15656, 15677, 16245, 16612; USNM 129409, 

 175388, 201247, 201249; TU 820, 1618, 14086 (stream, U.S. Hwy. 51, 2.4 mi. 

 S. Magnolia, Pike Co.), 14158, 14164, 17731, 19798, 23416, 23456, 23744; TU 

 (McGee Cr., Hwy. 98, Tylertown, Walthall Co.; Copiah Cr., Hwy. 27, 2.4 mi. S. 

 Georgetown, Copiah Co.); AF 3443, 4150 (trib. of Tangipahoa R., Pike Co.), 

 6271; UMMZ 113778 (trib. of Bogue Chitto R., 3 mi. N. Summit, Pike Co.), 

 146610 (creek, 1 mi., 1.5 mi., and 2 mi. S. Centreville, Wilkinson Co.), 155381, 

 155442, 157790, 157812, 161158 (Little Bahala Cr., U.S. Hwy. 51, 3.5 mi. N. Brook- 

 haven, Lincoln Co.), 161182 (Big Cr., U.S. Hwy. 51, 0.5 mi. N. Bogue Chitto, 

 Lincoln Co.), 161191 (stream, U.S. Hwy. 51, 2.5 mi. N. Bogue Chitto, Lincoln 

 Co.), 163715, 166120; UMMZ (Walker nos. 39-31, 39-32, 39-33, 39-37, 39-38, 

 39-49). South Carolina: CU (Suttkus no. 1210, trib. of Broad R., 5.1 mi. 

 S. Allendale, Allendale Co.); CU 15151. 15315 (trib. of Jackson Br., Hwy. 5, 

 1.8 mi. S. Sycamore, Allendale Co.), 19081 (trib.. North Fk. Edisto R., Hwy. 

 178, 11.5 mi. NW. Orangeburg, Orangeburg Co.), 19655 (Little R., Hwy. 22, 

 5.6 mi. E. Calhoun Falls, Abbeville Co.); USNM 162350 (trib.. South Fk. Edisto 

 R., U.S. Hwy. 1, about 10 mi. NNE. Aiken, Aiken Co.), 162522, 162555, 162574, 

 168117 (Keowee R., Hwy. 183, 14 mi. E. Walhalla, Oconee Co.), 192667 thru 

 192670, 192671 (Goodbys Cr., U.S. Hwy. 176, 2 mi. S. U.S. Hwy. 301, Orangeburg 

 Co.), 192672 thru 192674, 192675 (Edisto R., 2.75 mi. SSE. Branchville, Bam- 

 berg Co.), 192676 thru 192681, 200481; TU 14190 (Seneca R., U.S. Hwy. 76, 

 8.4 mi. SE. Pendleton, Anderson Co.). 



Type. — This species was originally described from a single specimen 

 which was probably destroyed in the Indiana University fire of 1883. 

 The type-locality is Silver Creek, one mile above its junction with the 

 Etowah River, Georgia. 



Diagnosis. — Noturus leptacanthus is the only member of the 

 subgenus Schilbeodes that typically has eight pelvic rays and an 

 included lower jaw. The pectoral spine is short, weakly if at all 

 grooved, and devoid of serrae, usually not even roughened on the 

 posterior edge. There are extremely large chromatophores (obscured 

 in old individuals) scattered over the body and fins. The adipose and 

 caudal fins are united. There are 47 to 58 caudal rays, 14 to 19 anal 

 rays, 7 to 10, usually 8 or 9 soft pectoral rays, 2 internasal pores, 

 and normally 11 preoperculomandibular pores. 



Description. — Other counts and measurements are given in 

 tables 17 to 26. The body is moderately elongate, little deeper forward 

 than behind; head rounded above, slightly arched, depressed between 

 the eyes; eye small, 2.0 to 2.7 times in snout; lower jaw included; pre- 

 maxillary tooth patch with rounded posterior corners; humeral 

 process moderate, usually a little longer than the diameter of the 

 pectoral spine; pectoral spine relatively short, with very shallow 

 grooves and without a trace of serrae; dorsal spine stout; adipose 

 fin always well connected to the caudal fin, but a shallow, broad 



