100 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



I, G ; A. 13 ; P. I, S ; V. 0. Iluraei^al i)rocess long. L. 5 iuclies. Eivers 

 of North Caroliua aud East Tennessee. 



(Jordan, Ann. Lye. Nat. Hist. N. Y. 1877,371; Jordan, 1. c. 101.) 



hh. Pectoral spines shortish, nearly straight, less than half length of head; the serra- 

 tures weak, less than half the diameter of the spine ; body elongated. 



§8. 'N. esaSBS Nelson. 



Color brown, mottled, the fins somewhat margined with dusky. 

 Pectoral spine slightly retrorse-serrate without, with about G small 

 straight teeth within, which are not one-third the diameter of the spine 

 in length. Head small, not very broad, but thin and depressed ; its 

 width 5-6 in length of body ; jaws nearly equal ; head 4 in length, 

 depth 5-6^. Dorsal scarcely higher than long. Distance from snout 

 to dorsal about 3 in length. Pectoral spine 3i-4 in this distance; 

 dorsal spine low, as near snout as anal. Anal rays 14-17. Humeral 

 process obscure. L. 4 inches. Wisconsin to Missouri and Kansas. 



(Nelson, Bull. III. Mus. Nat. Hist. 1876, 51; Jordan, 1. c. 100.) 



§9. j\. BBisagilis (Rich.) Gill & Jordan. 



Color dark brown, somewhat mottled, fins all dark-edged. Body 

 rather elongate. Pectoral spine retrorse-serrate without, weakly ser- 

 rate within. Head very broad, flat, and thin, upper jaw projecting ; 

 head about 44* in length, depth 6. Dorsal fin one-fourth higher than 

 long. Distance from snout to dorsal about 2^ in length. Length of pec- 

 toral spine 23 in same distance. Dorsal much nearer anal than snout. 

 Anal rays lG-20. Humeral process conspicuous, sharp. Size large j 

 reaches the length of nearly a foot, Pennsylvania to South Carolina; 

 common, 



{Pimelodiis inaigne Richardson, Fauna Bor.-Amer. iii, 32, 1836, based on Pimelode 

 licree Le Sueur, Mdm. Mus. v, 155 : Pimelodiis lemmsmtus C. & V. xv, 144 : Noturm ocd- 

 deiitalis Giinther, v, 105 : Noturus margiimtiis (Baird) Cope, Journ. Acad. Nat. Sci. 

 Phila. 1869, 237; Jordan, 1. c. 100.) 



**Premaxill:iry band of teeth with lateral backward processes,' as in Pilodiciis. 

 (Noiurus.) 



9©. 1^. flavoBS Raf. — Stone-cat. 



Color nearly uniform yellowish brown, sometimes blackish above, fins 

 yellow-edged. Body elongate. Head depressed, broad and flat, nearly 

 as broad as long. Middle region of body subcylindrical. Tail com- 

 pressed. Head about 4| in length ; width of head 5;^ ; depth D§ in 

 length. Distance to dorsal about 3 in length. Barbels short, A strong 

 keel on back behind dorsal, leading to adipose fin ; adipose fin deeply 

 notched. Dorsal spine very short. Pectoral spine retrorsely serrate in 



