46 TELEOSTE! : EVENTOGNATHI. — XIL. 
42. CYCLEPTUS Rafinesque. (kv«Aos, round; Aemrds, slender ; 
according to Rafinesque, small round mouth.) 
74. C. elongatus (Le Sueur). Buack Horsz. Gourp-strp 
Sucker. Mussourr Sucker. Head small, short and slender, 
rounded above; opercles small; eye small; fins large. Color 
blackish; ¢ in spring covered with small tubercles. Head 7; 
depth 43; D. 30; scales 9-56—7. L. 2} feet. Miss. valley, rather 
common in larger streams. 
43. CATOSTOMUS Le Sueur. FIne-scaLtep SUCKERS. 
(xdro, inferior ; otoua, mouth.) 
a. Scales very small, much reduced and crowded anteriorly, about 100 in the 
lateral line. (Catostomus.) 
75. C.catostomus (Forster). NorTHERN Sucker. Upper lip 
thin, with 2 to 4 rows of papille; snout long, overhanging the large 
mouth. Males in spring profusely tuberculate and with a broad 
rosy lateral band. Great Lakes to Alaska, very abundant N. 
aa. Scales larger, but small and crowded forwards, about 65 in the lateral 
line. (Decactylus Rafinesque.) 
76. c. teres (Mitehilly. Common Sucker. WuHite Sucker. 
Upper lip thin, with 2 or 3 rows of papille ; snout shorter than in 
the preceding, the mouth smaller. Color olivaceous, dusky above ; 
sides rosy in spring. Head 44; depth 44. D.12. Scales 10-64 
to 70-9. L.18. Canada to Montana and Fla.; commonest of the 
Suckers, and extremely variable. (Lat., terete.) 
aaa. Scales large, scarcely crowded anteriorly, 48 to 55 in the lateral line. 
(Hypentelium Rafinesque.) 
77. C. nigricans Le Sueur. Hoa Sucker. Stone ROLier. 
Stone Luecer. Srone Torer. HamMMeEr-HEAD. CRAWL-A- 
Bottom. Hog Motty. Hog Mutuet. Head flattened above, 
concave between eyes; the frontal bone thick, broad and short; 
eyes small, placed high ; upper lip thick, with 8 to 10 rows of 
papille ; lower fins large. Color brassy olive, the back with dark 
cross-blotches, disappearing with age; lower fins red. Head 4; 
depth 43. D. 11. Lat. 1.48 to 55. L. 2 feet. Lakes and clear 
streams, W. N. Y. to Ala. and Kans. (Lat, blackish.) 
44. ERIMYZON Jordan. (éps, an intensive particle; 
pute, to suck.) 
78. EB. sucetta (Lacépéde). Cuus Sucker. Sweet Sucker. 
CrEEK-FIsH. Scales crowded, deeper than long; mandible oblique. 
Color dusky, brassy below; young with black bands or bars and 
pale streaks, Head 4; depth 22 in adult; spring males with 6 
tubercles on snout. D. 11 to 13. Seales 43-15 in the northern 
form, var. oblongus Mitchill (the true sucetia, southern, with scales 
