29. SILURIDJi: AMTUEUS. 105 



the length of pectoral spine. L. 18 inches. Great Lakes, Ohio Valley, 



and eastward. The common bnll-head or horned poiifc of the North 



and East, abundant in every i^oud and stream ; also introduced into 



the rivers of California, where it has rapidly multiplied. 



( ? Silurus catus Liun. Syst. Nat. x, 305, 1758 : Pimclodus nebulosus Lo Sueur, M6m. 

 Mus. V, 149, 1819 : Pimclodus a.trarius DcKay, New York Fauna, Fish. 1842, 185 ; Jor- 

 dan, 1. c. 90.) 



c^. Lower jaw projecting beyond upper. 



99. A. VMBgraB'is (Thompson) Nelson. 



Dark reddish brown or blackish. Body moderately elongate ; depth 

 4^-5 in length. Head 3.^-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 pro- 

 jecting'. Anal rays 20. L. 18 inches. Vermont to Minnesota and south- 

 ward; rather common. 



{Pimclodus viihjaris Thompson, Hist. Vermont, 1842, 138: Pimclodus dclcaiji Girard, 

 Proc. Acad. Nat. Sci. Phila. 18.^)9, IGO : Pimclodus 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 broad ; mouth wide. 



100. A. matalis (Le Sueur) Jordan. — Yellow Cat. 



Yellowish, greenish, or blackish. Body more or less short and chubby, 

 sometimes extremely obese (var. natalis), sometimes more elongate (var. 

 lividus). Head short and broad. Mouth wide, the jaws equal (var. livi- 

 dus) or the upper jaw longest (var cu]}reus). Anal rays 24-27. Great 

 Lake region to Virginia and Texas ; generally abundant. Extremely 

 variable, and running into several varieties.* 



{Pimclodus iiaialis J^o Sueur, M6m. Mna. v, 154, 1(^19; Giinther, v, 101 ; Jordan, 1. c. 

 8G: Silurus lividus lialiuesque, Ichth. Oh. 1820, C'5: Piinelodus felinus nt anionicnsis Grd. 

 U. S. Pac. R. R. Expl. x, 209, 291 : Pimclodus catus, cvprcus, et cnprcoidcs Grd. Proc. 

 Acad. Nat. Sci.PIiila. 18.59,159, 160: Pi'Hie?orf«s ca!«os«s Richardson, Fauna Bor.-Amer. 

 iii, 132: Pimclodus cujrreus Hat'. Ichth. Oh. 1820, G5.) 



dd. Head elongate ; mouth narrow. 



101. A- ere ?jeEn BUMS Jordan. v 



Color black ; belly paler ; fins and barbels black. Body rather elon- 

 gate, compressed, the depth about 4J in length. Dorsal region rather 

 elevated; the head quite long and narrowed forward, 4 times in 

 length of l)ody. Head more narrowed than in any of the other spe- 

 cies. Width 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, 8G. 



