81 
Genus 58. Carostomus, Le Sueur. 
SUCKERS. 
105. Catostomus nigricans, Le Sueur.—HoG-sucKker; STONE-ROLLER ; 
ToTer; Craw-A-BoTTOM ; HaMMER-HEAD ; STONE-LUGGER ; Hoe- 
MOLLY. 
Occurs chiefly in streams, and frequents their rapids and shallows? 
in clear water. Commonest to the northward, probably owing to 
she clearer and more rocky character of the streams of that part of 
(linois. Taken rarely in lakes. 
106. Catostomos teres, Mitch.—Common Sucker; WHITE SUCKER; 
Brook Sucker; FINgE-sCALED SUCKER. 
(Bul. II, 64; Catostomus commersonii: Synop. 129; do.) 
Abundant northward, occurring rarely in the Illinois as far south 
as Peoria, and still more rarely in the extreme southern part of the 
State. Where it is abundant, it inhabits nearly all waters, both 
lakes and flowing streams. It is common in Lake Michigan. 
Genus 59. Cycteptus, Raf. 
Buack Horse. 
107. Cycleptus elongatus, Le Sueur.—Buack Horse; GourpD-sEED 
Sucker; M_ssourt SUCKER. : 
Rare in this State, occurring only in the larger rivers. Taken by 
us only from the Illinois. 
Genus 60. Icrropus, Raf. 
Burrato F:sHEs. 
108. Ictiobus cyprinus, Le Sueur.—Care Sucker; River Carp. 
(Bul. II, 65; Carpiodes velifer, Carpiodes selene, Carpiodes cutisan- 
serinus, Carpiodes difformis, Carpiodes bison, Carpiodes 
cyprinus, Carpiodes thompsoni, Carpiodes carpio: Synop., 
113, 119, 120; Carpiodes carpio, Carpiodes thompsoni, Carpio- 
des bison, Carpiodes cyprinus, Carpiodes difformis.) 
Abundant in the great rivers of the State and their larger tribu- 
taries, and also in Lake Michigan and the smaller lakes of Northern 
Benois. Extremely common in the lakes and ponds of the river 
ottoms. 
After prolonged study of the so-called species of native carp rep- 
‘resented in our collections, I have been compelled to merge them 
all in one, under the oldest specific name. 
s -<6 
