83 
114. Ictalurus ponderosus, Bean.—Great CatT-FISH. 
One of the gigantic cat-fishes. Described from the Mississippi at 
St. Louis. Has not occurred in our collections, unless some speci- 
mens belong to it which are apparently intermediate between this 
and Ictalurus nigricans. I doubt if it is distinct from the latter. 
115. Ictalurus nigricans, Le Sueur.—Cat-FisH oF THE Lakes; GREAT 
Forx-tarn Car; Mississrppr1 Cat; Fiorma Cat; FLANNEL- 
MOUTH UAT. 
Bul. Il, 66; Amiurus nigricans: Synop., 108; Ictalurus lacustris. 
One of the gigantic cat-fishes of the Ohio, Illinois and Mississippi, 
and of Lake Michigan. Probably the most abundant of the large 
species. : 
116. Jctalurus natalis, Le Sueur.—Yrniow Cart. 
Glee bO. Amiurus natalis : Synop., 105; do.) 
Occurs everywhere throughout Illinois, but less abundantly than 
nebulosys, and preferring larger streams. It has not been taken by us 
from ponds and lakes except where these were immediately con- 
nected with streams subject to overflow. 
117. Ictalurus nebulosus, Le Sueur.—Bunu-HEAD; Hornep Poor; 
SMALL CatT-FISH. 
(Bul. II, 66; Amiurus vulgaris, Amiurus catus, Amiurus melas, 
Amiurus canthocephalus: Synop., 104; Amiurus xanthocephalus, 
Amiurus melas, Amiurus catus.) 
Abundant in all waters, frequenting by preference ponds and muddy 
streams. It occurs, however, in clear lakes and creeks, and has 
been taken by us occasionally in the larger rivers. It is the every- 
where abundant ‘‘bull-head,” or ‘‘bull-pout.” 
118. Ictalurus marmoratus, Holbrook.—MarBuep Cat. 
(Bul. II, 67; Amiurus marmoratus: Synop., 104; do.) 
The Marbled Cat has not occurred in the northern part of the 
State, but seems to be most abundant in the Iilinois and its tribu- 
taries. Confined almost wholly to the larger streams and their im- 
mediate affluents, in Central and Southern Illinois. 
Genus 62. Leprors, Raf. 
Mvp Carts. 
119. Leptops olivaris, Raf—Mup Car; YELLow Car. 
Bul. Il, 67; Pelodichtiiys olivaris. 
_ Common in the larger streams. Obtained by us only from the 
Illinois, Wabash and Ohio Rivers. 
