68 U.S. NATIONAL MUSEUM BULLETIN 282 



seems that N. insignis and A^^. nocturnus are more closely related; 

 that A^. exilis has an affinity with Noturus lachneri and through that 

 species with Noturus gyrinus. This cluster of species has in common 

 a terminal mouth and similar pore counts. Divergence in the group 

 was probably early as judged by the increase in anal and paired fin 

 rays, reduction in number of caudal rays, and well-developed pectoral 

 spine serrae in N. exilis. 



Ecology. — A^. exilis lives entirely in streams of small or medium 

 size in moderate or fast current. It occurs on riffles composed of 

 coarse gravel, rubble, or loose slab rock. 



Noturus exilis has been taken in collections with gyrinus, nocturnus, 

 flavus, albater, placidus, jlavater, miurus, elegans, and the specimen 

 referred to elegans from Piney Creek, Alabama. 



Noturus leptacanthus Jordan 



SPECKLED MADTOM 

 Plates 3 (fig. 4), 8 (fig. 2); Map 3 



Noturus leptacanthus Jordan. — Jordan and Copeland, 1876, p. 160 (nomen 

 nudum; Alabama R.). — Jordan, 1877b, pp. 352-372 (original description; 

 the single specimen from Silver Cr., 1 mi. above its junction with the Etowah 

 R.); 1877d, pp. 73-102, pi. 41, figs. 64-65 (description; synonymy; type 

 figured). — Jordan and Bray ton, 1878, pp. 44-87 (description; Chattahoochee 

 R., near Gainesville, Georgia; record relisted). — Jordan, 1878a, p. 119; 

 1878d [and 1884], p. 336; 1878e, p. 414.— Swain and Kalb, 1883, pp. 639-644 

 (description; range [except Enterprise, Miss.]). — Jordan and Gilbert, 1883, 

 pp. 98-99 (description; range [in error]). — Jordan, 1885, p. 802. — Jordan and 

 Gilbert, 1886, p. 7 (comparison). — Jordan, 1889, p. 353 (relationship). — 

 Gilbert, 1890, p. 226 (Georgia record); 1891, pp. 153-157 (Alabama records: 

 Choccolo Cr.,* Oxford; Cahawba R., Helena;* Little Escambia R.,* Pollard; 

 Hawkins Cr., Greenville;* Sand(y) Cr.,* Evergreen). — Woolman, 1892b, 

 p. 301 (description; Florida record). — Palmer and Wright, 1922, p. 356 

 (compiled). — Bailey, Winn, and Smith, 1954, pp. 114-160 (fresh water; 

 range; synonymy; records, Escambia R.,* Alabama and Florida [all were 

 examined]).— Eddy, 1957, p. 152, fig. 383.— Taylor, 1957, p. 192.— Briggs, 

 1958, p. 260 (SE. United States to Lake Co., Fla.).— Cook, 1959, pp. 34, 135, 

 141 (description; Mississippi records). — Parsons and Crittenden, 1959, p. 191 

 (Chipola R., Florida). — Suttkus, 1961, p. 63, fig. 5 (comparison; skull illus- 

 trated). — Patrick, 1961, p. 2.56 (Escambia and Flint Rivers). — Boschung, 

 1961, pp. 275, 282 (compiled).— CoUette and Yerger, 1962, p. 225 (ecology; 

 Okaloosa and Walton Counties, Fla.). — Anderson, 1964, pp. 45, 51 (South 

 Carolina records). — Suttkus and Taylor, 1965, p. 177 (associations). — 

 Richards, 1966, p. 829 (associations with Etheostoma inscriptum). — Hellier, 

 1967, pp. 18-46 (parasites, ecology, distribution, Santa Fe R., Fla.). — 

 Suttkus and Ramsey, 1967, p. 140 (associations with Percina aurolineata, 

 Cahaba R., Ala.). 



Schilbeodes leptacanthus (Jordan). — Jordan and Evermann, 1896a, pp. 14.5-146 

 (description; range); 1896b, p. 234. — Evermann and Kendall, 1900, p. 51 



♦Material indicated by an asterisk has been re-examined. 



