29. SILURIDJL AMIUEUS. 
105 
tlie length of pectoral spine. L. 18 inches. Great Lakes, Ohio Valley, 
and eastward. The common ball-head or horned pout of the North 
and East, abundant in every pond and stream ; also introduced into 
the rivers of California, where it has rapidly multiplied. 
( ? Silurus catus Linii. Syst. Nat. x, 3U5, 1758 : Pimelodus neiulosus Le Sueur, Mdm. 
Mus. V, 149, 1819: Pimelodus atrarius DeKay, New York Fauna, Fisk. 1842, 165; Jor- 
dan, 1. c. 90.) 
CO. Lower jaw j)iojectiug beyond upper. 
99. A. VMS§’aras (Thompson) Nelson. 
Darii; reddish brown or blackish. Body moderately elongate ; depth 
4^-5 ill length. Head 3i-4. Barbel long. Mouth wide. Head longer 
than broad, rather narrowed forward. Profile rather steep, pretty evenly 
convex. Dorsal region more or less elevated. Lower jaw strongly x)ro- 
jectiug. Anal rays 20. L. 18 inches. Vermont to Minnesota and south- 
ward ; rather common. 
{Pimelodus vulgaris Thomxison, Hist. Vermont, 1842, 138: Pimelodus dclcagi Girard, 
Proc. Acad. Nat. Sci. Phila. 1859, IGO : Pimelodus ailurus Girard, U. S. Pac. E. R. Expl. 
Fish. 1858, 210; Jordan, 1. c. 88.) 
aaa,. Anal fin long, of 24-27 rays, its base more than one-fourth the length. 
d. Head brood ; mouth wide. 
199. A. matalis (Le Sueur) Jordan. — Yellow Cat. 
Yellowish, greenish, or blackish. Body more or less short and chubby, 
sometimes extremely obese (var. natalis), sometunes more elongate (var. 
Uvidus). Head short and broad. Mouth wide, the jaws equal (var. livi- 
dus) or the uiiper jaw longest (var cupreus). Anal rays 24-27. Great 
Lake region to Virginia and Texas*; generally abundant. Extremely 
variable, and running into several varieties.* 
{Pimelodus natalis Le Sueur, M^m. Mus. v, 154, 1819 ; Gunther, v, 101 ; Jordan, 1. c. 
86: Silurus Uvidus Eafiuesque, Ichth. Oh. 1820, 05: Pimelodus felin us et anioniensis Grd. 
U. S. Pac. R. R. Expl. x, 209, 291 : Pimelodus catus, cuprous, et cuprcoides Grd. Proc. 
■Acad. Nat. Sci. Phila. 1859,159, 160: PimHodas c«;?!osms Richardson, Fauna Bor.- Amei'. 
iii, 132: Pimelodus cupreus Raf. Ichth. Oh. 1820,65.) 
dd. Head elongate ; mouth narrow. 
191. A. eretJCMfiaMS Jordan. 
Color black ; belly paler ; fins and barbels black. Body rather elon- 
gate, compressed, the depth about 4^ in length. Dorsal region rather 
elevated; the head quite long and narrowed forward, 4 times in 
length of body. Head more narrowed than in any of the other spe- 
cies. AYidth of the head in front of the eye but little more than half 
its length. Width of the mouth about half the length of the head. 
For a discussion of which see Jordan, Bull. U. N. Nat. Mus. x, 86. 
