i7o Natural History Bulletin. 



Gemis I J. Cycleptus. — Rafinesque. 



23. Cycleptus elongatus. — LeSueur. — Black-horse. Mis- 



souri Sucker. Gourd-seed Sucker. 



This species inhabits only the larger streams. It is not 

 very abundant. It reaches a length of 2^ feet, and is the 

 best food fish in the family. Mississippi valley. 



// Dorsal fin short, its rays 12 to 16. 



q Air bladder in two parts. 



r Lips thick, papillose. Scales in the lateral line 50 to 70. Fontanelle pres- 

 ent. 



Genus 14.. Catostomus. — LeSueur. 



s Scales on anterior part of the body crowded forward. 65 to 70 scales in the 

 lateral line. Color nearly plain. 



24. Catostomus teres. — Mitchill. — Common Sucker. 



White Sucker. 



This is the commonest Sucker. It reaches a length of 18 

 inches, and is a poor food fish. Montana to Canada and 

 south. 



55 Scales not crowded anteriorly. 4S to 55 in the lateral line. The back 

 with dark black blotches. 



25. Catostomus nigricans. — LeSueur. — Hog Sucker. Hog 



Mullet. Stone Toter. 



This Sucker is common in streams and lakes. It grows 

 somewhat larger than the preceeding and is nearly worthless 

 as a food fish. Western New York to Iowa, Kansas and 

 Alabama. 



rr Lips thin, plicate. Scales, 40 to 50 in the lateral line. 



/ Lateral line wanting. Sides in the young with a dark lateral band. Scales 

 in lateral line 40. 



Genus 15. Erimyzon. — yordan. 



26. Erymyzon sucetta. — Lacefede. — Chub Sucker. Sweet 



Sucker. 



This species appears to be quite scarce in this state. It 



