100 CONTRIBUTIOXS TO NORTH AMERICAN ICHTHYOLOGY IV. 
I, G ; A. 13 ; P. I, 8 ; V. 0. Ilniueral process long. L. 5 inches. Eicers 
of North Carolina and East Tennessee. 
(Jordan, Aim. Lyc. Nat. H!.st. N. Y. 1877,371; Jordan, 1. c. 101.) 
hh. Pectoral spines sliortisli, nearly straiglifc, less than half lengtli of head ; the serra- 
tiires weak, less than half the diameter of the spine ; body elongated. 
88. IV. exaSas 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-G in length of body ; jaws nearly equal ; head 4 in length, 
depth 5-G4. Dorsal scarcely higher than long. Distance from snout 
to dorsal about 3 in length. Pectoral spine 3|V-4 in this distance; 
dorsal spine low, as near snout as anal. Anal raj’s 14-17. Humeral 
process obscure. L. 4 inches. Wisconsin to Missouri and Kansas. 
(Nelson, Bull. 111. Miis, Nat. Hist. 1876, 51 ; Jordan, 1. c. 100.) 
89. jV. iBiSS?jsacs (Rick.) 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 4;^ in length, depth G. Dorsal fin one-fourth higher than 
long. Distance from snout to dorsal about in length. Length of pec- 
toral spine 2 ^ in same distance. Dorsal much nearer anal than snout. 
Anal rays lG-20. Humeral process conspicuous, sharp. Size large; 
reaches the length of nearly a foot. Pennsylvania to South Carolina; 
common. 
{rimeloiius insujne Rickardsoii, Fauna Bor.-Amer. iii, 32, 1836, based on PiniGlocle 
R(u-ee Le Sueur, Mem. Mus. v, 155: rimeloclns lemniscatus C. & V. xv, 144 : Notiirnsocci- 
dentaJis Giintber, v, 105 : Noiitrus marginatus (Baird) Cope, Journ. Acad. Nat. Sci. 
Pliila. 1869, 237; Jordan, 1. c. 100.) 
** Premaxillary band of teetb with lateral backwai’d jirocesses, as in Pilodictis. 
(Xotiirus.) 
94>. IV. fiaVBSS 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 ; depth of 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 
