105 

 Genus 58. Catostomus, Le Sueur. 



Suckers. 



105. Catostomus nigricans Le Sueur. — Hog-sucker; Stone-roller; 



Toter; Crawl-a-bottom ; Hammer-head; Stone-lugger; 

 Hog-molly. 



Occurs chiefly in streams, and frequents their rapids and shallows, 

 in clear water. Commonest to the northward, probably owing to 

 the clearer and more rocky character of the streams of that part of 

 Illinois. Taken rarely in lakes. 



106. Catostomus teres, Mitch. — Common Sucker; White Sucker; 



Brook Sucker; Fine-scaled Sucker. 



(Bui. II, 64; Catostomus commersonii: Synop. 1'29 ; do.) 



Abundant northward, occurring rarely in the Illinois as far south 

 as Pe(5ria, 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. Cycleptus, Eaf. 



Black Horse. 



107. Cycleptus elongatus, Le Sueur. — Black Horse ; Gourd-seed 



Sucker; Missouri Sucker. 



Eare in this State, occurring only in the larger rivers. Taken by 

 us only from the Illinois. 



Genus 60. Ictiobus, Raf. 



Buffalo Fishes. 



108. Ictiobus cyprinus, Le Sueur. — Carp Sucker; River Carp. 



(Bui. II, 65 ; Carpiodes velifer, Carpiodes selene, Carpiodes cutisan- 

 serinus, Carpiodes diffurmis, Carpiodes bison, Carpiodes 

 cyprinus, Carpiodes thompsoni, Carpiodes carpio: Synop., 

 118, 119, 120; Carpiodes carpio, Carpiodes tliompsoni, Carpio- 

 des bison, Carpiodes cyprinus, Carpiodes dijformis.) 



Abundant in the great rivers of the State and their larger tribu- 

 taries, and also in Lake Michigan and the smaller lakes of Northern 

 Illinois. Extremely common in the lakes and ponds of the river 

 bottoms. 



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. 



