SILURIDZ. 83 
5. AMIURUS LUPUS, (Girard) Giinther. 
Texas Cat. . 
(Figs. 9 and 10.) 
Pimelodus lupus, GIRARD (1858), U. S. Pac. R. R. Expl. x, 211. 
Amiurus lupus, GUNTHER (1864), Cat. Fishes Brit. Mus. v., 101. 
Habitat.—Streams of Texas. 
This species strongly resembles Ichthelurus punctatus, but differs in 
the shorter body, wider mouth, and darker colors, as well as in the 
generic character of the free supraoccipital. In this species, however, 
there intervenes scarcely more than the diameter of a pin’s head between 
the supraoccipital and the interspinal, in specimens 8 inches long; so 
nearly connected are they that I was at first disposed to consider this 
species as an Ichthelurus. Numerous specimens of A. lupus are in the 
museum from Texas. | 
6. AMIURUS NIVEIVENTRIS, Cope. 
White-bellied Cat. 
(Figs. 11 and 12.) 
Amiurus niveiventris, COPE (1870), Proc. Am. Philos. Soc. 486; JorDAN & COPELAND 
(1876), Check List, 159. 
Habitat.—Neuse River, North Carolina. 
This species seems to be very close to A. lupus, but appears to 
differ in the broader head and in some other features. I have seen no 
specimens of it. 
7 AMIURUS NIGRICANS, (Le Sueur) Gill. 
Great Fork-tailed Cat—Mississippi Cat.—Florida Cat. 
(Figs. 13 and 14.) 
Pimelodus nigricans, LE SUEUR (1819), Mémoires du Muséum d’Hist. Nat. v, 153.—Cuv. 
& VAL. (1840), xv, 183.—DrE Kay (1842), Fishes N. Y. 180.—STorER (1846), 
Synopsis, 403.—‘‘ Hyrtt (1859), Denkschrift Akad. Wiss. Wien, xvi, 16.” 
Amiurus nigricans, GILL (1862), Proc. Bost. Soc. Nat. Hist. 44.—JorDAN (1876), 
Man. Vert. 318.—JORDAN & COPELAND (1876), Check List, 159 (not of GUN- 
THER (1864) nor of CopE (1870)= A. cenosus). 
Silurus ( Pimelodus) nigrescens, RICHARDSON (1836), Fauna Bor.-Am. Fishes, 134. 
Pimelodus sp. incog., THOMPSON (1842), History Vermont, 139. 
Pimelodus coerulescens, in part of RAFINESQUE, KIRKLAND, and others; the big “ Chan- 
nel Cats” all belong to this species. 
Habitat.—Great Lakes and Mississippi River, ascending all the larger 
tributaries, larger rivers of the South Atlantic and Gulf States gen- 
erally. 
