84 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY—II. 
This species is the ‘Great Fork-tailed Cat” of the Lakes and the 
‘Great Mississippi Cat” of the Mississippi and Ohio Rivers. Ihave seen 
and identified specimens of thirty to forty pounds weight, and have seen 
specimens which I suppose were of this species which weighed nearly a 
hundred pounds. I have heard of Catfish weighing two or three hun- 
dred pounds, but have never seen them, and presume they were “ weighed 
by guess”. This species undoubtedly attains the largest size of any of 
our representatives of the family. Specimens of this species of a large 
size are in the United States National Museum, from St. John’s River, 
Florida. They appear to have a rather steeper front than the northern 
ones, but are otherwise similar. 
As indicated above, the “A. nigricans” of Dr. Giinther is probably the 
cenosus, as the present species has the caudal fin strongly forked. 
8 AMIURUS BOREALIS, (Richardson) Gill. 
The Mathemeg or Land Cod. 
Pimelodus borealis, RICHARDSON (1836), Fauna Boreali-Americana, Fishes, 135.—Cuv. 
& VAL. (1840), xv, 130.—SrorRER (1846), Synopsis, 402. 
Amiurus borealis, GILL (1862), Proc. Bost. Soc. Nat. Hist. 44.—GUNTHER (1864), 
Cat. Fishes, v, 100.—Copr (1870), Proc. Am. Philos. Soc, 485.—JorDAN & COPE- 
LAND, Check List, 159. 
Habitat.—British America. 
I do not know this species, and it may not really have a forked caudal 
fin. It is not improbable that its relations are with Amiurus cenosus 
rather than with A. nigricans. 
9. AMIURUS ALBIDUS, (Le Sueur) Gill. 
Hastern Fork-tailed Cat—‘‘Channel Cat” of the Potomac. 
(Figs. 15 and 16.) 
Pimelodus albidus, Ue SuEUR (1819), Mém. du Mus. d’Histoire Nat. v, 148.—Cuv. & 
Vat. (1340), xv, 131. 
Amiurus albidus, GILL (1862), Proc. Bost. Soc. Nat. Hist. 44. 
Pimelodus nebulosus, CUV. & VAL. (1840), xv, 132 (in part; not of Le Sueur). 
Amiurus nebulosus, GUNTHER (1864), Cat. Fishes, v, 101. 
Pimelodus lynx, GIRARD (1859), Proc. Acad. Nat. Sci. Phila. 160. 
Amiurus lynx, GILL (1862), Proc. Bost. Soc. Nat. Hist. 44.—Copx (1870), Proc. Am. 
Philos. Soc. 485.—UnLerR & LUGGER (1876), Fishes Maryland, 152.—JORDAN 
(1876), Man. Vert. 300.—JORDAN & COPELAND (1876), Check List, 160. 
Ictalurus macaskeyi, STAUFFER (1869), Mombert’s History Lancaster Co. Pa. 578. 
Ictalurus kevinskii, STAUFFER (1869), Mombert’s History Lancaster Co. Pa. 578. 
Habitat.—Atlantie streams, Pennsylvania to North Carolina. 
The Pimelodus albidus of Le Sueur* seems to me rather to have been 
* Le Sueur says: “ Téte large, aplatie; * * couleur d’un blane cendré2 * * * 
re o~) b] 
caudale tres légerement echancrée,” characters evidently belonging to the lynx rather 
than to the catus. This is the more plain, as in describing the distinctly fork-tailed 
