PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 639 



6&. Pectoral spine entire or grooved behind, never retrorse-serrate ; adipose fin 

 not at all or scarcely notched. 

 /. Head small and narrow, longer than broad ; its length about 4 in body, 

 its -width 5-J ; upper jaw projectiug ; spines very short and weak, that 

 of the dorsal one- third height of fin; pectoral spine slightly retrorse- 

 serrate without, rather obscurely grooved within, its length 3^ in head; 

 anal rays, 14 ; color yellowish, rather dusky on head ; somewhat mot- 

 tled Leptacantiius, 6. 



f. Head short, broad, and deep ; pectoral spine without serration in front, 

 grooved behind, its length 2 in head ; jaws subequal ; barbels short, 

 maxillary barbel more than 2 in head ; color yellowish-brown, more or 

 less dusky, never blotched ; a narrow black lateral streak, and often 

 two dorsal ones ; anal rays, 15 or 16 G yrinus, 7. 



1. Noturus flavus Rafinesque. 



Noturus flavub Rafinesque, Am. Month. Mag. and Critical Rev., 41, 1818; Rafi- 

 nesque, Ich. Ohiensis, 68, 1820 (Falls of Ohio) ; Kirtland, Bost. Jour. Nat. 

 Hist., V, 336, 1846 (Mahoning River and Lake Erie); Storer, Syn., 406, 

 1846 (copied); Gill, Proc. Bost. Soc. Nat. Hist., 45, 1862; Cope, Journ. 

 Acad. Nat. Sci. Phila., 236, 1869; Guuther, Cat. Fishes, V, 184 (Ohio);? 

 LTiler and Lugger, Fishes of Maryland, 151, 1876 (Potomac and Patapsco 

 Rivers) ; Jordan, Ann. N. Y. Acad. Sci., vol. I, No. 4, 1877, 118; Jordan, Ann. 

 Lye. Nat. Hist. N. Y., 372, 1877 (Platte River to Saint Lawrence River, 

 Ohio Valley and N.E.) ; Jordan, Bull. Nat. Mus., X, 97, 99, 1877 (Vermont 

 and Canada to Va., Ohio Valley, and Missouri region) ; Jordan, Rept. on 

 Fishes of Ohio, 799, 1882. (Canada to Va., Mo., and Mon.); Jordan, Man. 

 Vert., 335, 1878 (St. Lawrence to Ky. and Upper Mo.) ; Jordan, Bull. Ills. 

 Lab. Nat. Hist., No. 2, 67, 1878; Jordan and Gilbert, Syn. Fishes N. A., 

 100, 1883 (Ver. to. Va., Neb., and Tex.). 



Noturus lufeus Rafinesque, Jour, de Physique, 421 , 1819. 



Noturus occidentalis Gill, Proc. Bost. Acad. Nat. Hist., 45, 1862; Gill, Ichth. 

 Capt. Simpson's Rept., 423, 1876 (Platte River) ; Jordan and Copeland, 

 Check List, 160, 1876 (Platte River; no description). 



Noturus pJatycejfhalus Giinther, Cat. Fishes, V, 104, 1864 (N. A.); Jordan and 

 Copeland, Check List, 160, 1876 (no description). 



Hahitat.—VeTmont to Virginia and westward to I^ebraska ; Lake 

 Erie; Saint Lawrence. Ohio, Mahoning, Potomac, Patapsco, White, 

 Platte, and Missouri Elvers; Swartz Creek, Michigan. 



2. Noturus elassochir, sj). nov. 



Eahitat— Illinois Eiver. 



Head, 4; depth, 5f ; width of head, 5. D. I, G; A. 16. 



Body robust, somewhat elevated in the dorsal region. Head moder- 

 ate. Month large ; its width 1| in head. Interorbital space about equal 

 to the length of snout, which is 3 in head. Jaws subequal. Maxillary 

 barbel rather short, 2^ in head. Dorsal spine rather weak, but nearly 

 as long as the very short pectoral spine, which is 3^ in head. The ser- 

 ration is very similar to that of insignis, but much less distinct in front. 

 Humeral process obscure. Adipose fin long, low, with emargiuatiou 

 well defined ; caudal and anal fins large. 



