COMMON SUCKER. 817 
Cotostomus aurora, AGASSIZ, Lake Superior, 1850, 360, pl. 2, f. 3-4; Purnam, Bull. Mus. 
Comp. Zool., 1863, 10. 
Acomus aurora, GIRARD, Proc. Acad. Nat. Sci. Phila., 1856, 173. 
Acomus griseus, GIRARD, Proc. Acad. Nat. Sci. Phila., 1856, 174; U.S. Pac. R. R. Expl, 
XK, 1858, 222, pl. xlix. 
Catostomus griseus, GUNTHER, Cat. Fishes Brit. Mus., vii, 1868, 14.—JORDAN and CorE- 
LAND, Check List, 1876, 156. 
Catostomus griscum, Corn, Hlayden’s Geol. Surv. Wyoming, 1870, 434, 
Catosiomus lactarius, GERARD, Proc. Acad. Nat. Sci. Phila., 1836, 174.—JORDAN and CoPE- 
LAND, Check List, 1876, 156. 
Acomus lactarius, GIRARD, U.S. Pac. R. R. Expl., x, 1858, 223. 
Description.— Body elongate, subterete; head quite long and slender, depressed and 
flattened above, broad at base but tapering into a long snout, which considerably over- 
hangs the large mouth; lips thick, coarsely tuberculate; the upper lip narrow, witu 
two or three rews of papille ; Jaws without cartilaginous sheath; eye rather small, 
behind the middle of the head; fontanelle large; scales very small, much crowded for- 
wards; color dusky above, pale below, the males in spring with a broad rosy lateral 
band, and with the head and anal fin profusely tuberculate, the tubercles on the head 
smalls head 44 to 4? in length; depth 4} to 42; D., 10 or 11; lat.1., 95 to 114; 26 to 31 
scales in @ cross series from dorsal to ventrals. Length, 14 to 2 feet. 
Habitat, Great Lake region to Alaska, very abundant throughout British America. 
Diagnosis.—This is the enly Obio Sucker which has more than 70 
scales in the lateral line. 
Habits —This fish is quite abundant in Lake Erie, where it is taken 
with other speciesin the net. It does not often ascend the streams, and 
is almost never seen in waters tributary to the Ohio. It is a fish of 
northern distribution and likes cold, clear waters. 
39. CatTostomus TERES (Mitchell) LeSueur. 
Common Sucker; White Sucker; Brook Sucker; Fine= 
scaled Sucker. 
LeCyprin commersoniew, LACEPEDE, Hist. Nat. des Poiss., v, 1803, 562, 508. 
Catostomus commersoni, JORDAN, Man. Vert., 2d Ed., 1878, p. 329. 
Cyprinus catostomus, Peck, Mem. Am. Acad., ii, 18—, pt. 2, p. 55, pl. 2, f. 4. (Not of 
Forster.) 
Cyprinus teres, MITCHILL, Lit. and Phil. Trans. New York, i, 1814, 458. 
Catostemus teres, LESUEUR, Journ. Acad. Nat. Sci. Phila., 1817, 108—THompson, Hist. 
Vi., 1842, 134.—Cuvinr and VALENCIENNES, xii, 1844, 468.—STORER, Synopsis, 1846, 
423.—Ag@assiz, Am. Journ. Sci. Arts, 2d series, xix, 1855, 208 —GUNTHER, Cat. Fishes 
British Mus., vii, 1668, 15.—Copx, Prec. Am. Philos. Soc. Phila., 1870, 468.—Jorpan, 
Fishes of Ind., 1875, 221; Man. Vert., 1876, 293; Bull. U. S. Nat. Mus., ix, 1877, 37; 
“ii, 1878, 166.—Nexuson, Bull. No. 1, Ills. Mus. Nat. Hist., 1876, 48.—JoRDAN and 
CorELanb, Check List, 1876, 156.—JoRDAN and GILBERT, in Klippart’s Rept., 1876, 
53; ib., 1878, 84, pl. xii, f. 18-19. 
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