CATFISH GENUS NOTURUS RAFINESQUE 77 



CU 15525; TU 765, 882, 1335, 2068, 3932, 4258, 4875, 6252, 6265, 13248, 13347, 

 13625, 13680, 13714, 14089, 14833, 15844, 16795, 20908; TU (Big Cr., Pollock, 

 Grant Parish); USNM 163119, 172110, 172333, 172528, 172550, 172638, 172654, 

 172670, 172682, 172716, 172808, 172873, 172884, 172926, 172962, 172980, 172998, 

 173056, 173100, 173118, 173143, 173169, 173282. Mississippi: UMMZ 163717; 

 UMMZ (Walker no. 39-32; Sandy Cr., 15 mi. N. of luka, 1 mi. W. of Hwy. 25); 

 AF 3255 (Okahatta Cr., trib. to Chunky Cr., Newton Co.); TU 6255, 14941, 

 15184, 17729, 19786, 23514. Missouri: UMMZ 139501, 139569, 139585, 

 139649, 139723, 142185, 142203, 148564, 149251, 149739, 149994 (Mississippi 

 R., Canton, Lewis Co.), 150225 (Osage R., 5 mi. SE. of Amoret or 5 mi. NW. of 

 Foster, Bates Co.), 152749, 153130, 153151, 164582; INHS (lower St. Francis R., 

 Butler and Dunklin Counties; Osage R., N. of Schell City, Vernon and Bates 

 Counties; Meramec R., 2 mi. SE. of St. Clair, Franklin Co.; Salt R., 6 mi. N. of 

 Center, Ralls Co.); UMoMZ (A.C. Bauman nos. 50, 54; C.B. Obrecht no. 41-29, 

 Current R., 7 mi. N. Doniphan, Ripley Co.). Oklahoma: UMMZ 156771, 

 167176, 167177, 167178, 167182 (Chikaskia R., below L. BlackweU, Kay Co.), 

 167184 (trib. to Washita R., Dougherty bridge, Murray Co.), 167195, 167201 

 (Shoofly Cr., at bridge N. of Braman, Hwy. 177, Kay Co.), 167214; OAM 4112; 

 Tulsa U (Grand R., at Earbob Cr., Mayes- Wagoner Co. line; creek, 0.5 mi. 

 N. of Okay; Big Skin Bayou, U. S. Hwy. 64; Brushy Cr., 2 mi. S. of Choteau, 

 Mayes Co.; Bird Cr., Avant, Osage Co.; creek, 10.5 mi. S. Antlers, Choctaw Co.; 

 California Cr., 2 mi. S. Delaware; Poteau R., 4 mi. SE. Heavener, Le Flore Co.; 

 Pryor Cr., 1.5 mi. S. Pryor; Caney R., Hulah Dam, Osage Co.; Little Beaver Cr., 



1 mi. W. Hardy, Kay Co.; Bird Cr., 1.5 mi. NW. Catoosa; Verdigris R., 1 mi. 

 N. of U. S. Hwy. 66, Rogers Co. ; Big Lee Cr., 2 mi. E. Nicut) ; TU 13776 (Chikaskia 

 R., 5.4 mi. NW. Braman, below Lake BlackweU); USNM 165779, 165796; CU 

 14134. Tennessee: UMMZ 168328; USNM 193480, 193481 (Rose Cr., 2 mi. 

 above mouth, Hardeman Co.) ; Tennessee Game and Fish Comm. (Cumberland 

 R., mi. 232, Old Hickory Reservoir). Texas: UMMZ 161774; UMMZ (Delavan 

 and Creaser no. 31-39, White Rock Cr., Preston Road, 12 mi. N. of Dallas); 

 TNHC 1046, 1196 (trib. of Peach Cr., Hwy. 105, 15 mi. E. of Conroe, Mont- 

 gomery Co.), 1388 (West Fk. San Jacinto R., 3 mi. W. of Conroe, Montgomery 

 Co.), 1439 (trib. to Long Cr., 2 mi. N. of Goodrich, Hwy. 59, Polk Co.); TU 

 3384, 3415, 3477, 3505, 3791 (trib.. Trinity R., Hwy. 294, 3.7 mi. W. Elkhart, 

 Anderson Co.), 3853, 14042, 14044, 14063 (stream, Hwy. 105, 8.1 mi. E. Conroe, 

 Montgomery Co.), 14066, 14323, 14346, 21679, 21734, 21797, 21910. 



Diagnosis. — Noturus nocturnus, subgenus Schilbeodes, has 55 to 

 64 caudal rays; 15 to 20, seldom more than 18 anal rays; 8 to 10, 

 typically 9 pelvic rays; 7 to 11, modally 9 or 10 soft pectoral rays; 



2 internasal pores; and normally either 10 or 11 preoperculomandibular 

 pores. The lower jaw is included. The pectoral spine is roughened 

 behind; there are seldom distinct serrae. The vertical fins frequently 

 have narrow, dark submarginal bands and very narrow, clear margins; 

 the dorsal and lateral surface of the body and the vertical fins other- 

 wise are nearly unicolor. 



N. nocturnus is superficially similar to N. insignis, N.funebris, and 

 A^. phdeus ; it is easily segregated from the other species of Schilbeodes 

 by several of the above characters. Distinguishing it from insignis 

 are the more rounded head, shorter body, and the usual absence of 

 serrae on the posterior edge of the pectoral spine. The poorly pig- 



