‘ 
LAKE CARP. ro 
Diagnosis.—This species may usually be readily known from the closely 
related ©. velifer by the lower dorsal, and from C. thompsoni by the slen- 
derer body and larger scales. 
Habits. —This is the common Carp Sucker of Eastern Pennsylvania and 
of the Southern and Southwestern States. It has not yet been noticed in 
Ohio, but it doubtless occurs here. 
32. CARPIODES THOMPSONI Agassiz. 
Lake Carp. 
Catostomus cyprinus, THOMPSON, Hist. Vt., 1842, 133. 
Carpiodes thompsoni, AGassiz, Am. Journ. Sci. Arts, 2d series, xix, 1865, 191.—CopE, Proc. 
Acad. Nat. Sci. Phila., 1864, 285; Proc. Am. Philos. Soc. Phila., 1870, 483.— JORDAN, 
Man. Vert., 1876, 297; 2d Ed , 1878, 322; Bull. U. S. Nat. Mus., xii, 1873, 198.—Jor- 
DAN and COPELAND, Check List, 1876, 158.—JoRDAN and GILBERT, in Klippart’s 
Rept., 1876, 53. 
Ichthyobus thompsoni, NeLsoNn, Bull. No.1, Ill. Mus. Nat. Hist., 1876, 49. 
Description.—Body short and stout, the back much arched, head moderate, the muzzle 
somewhat pointed; eye small, 64 in head; tip of lower jaw much in advance of the nos- 
trils ; maxillary reaching line of orbit; anterior suborbital large, deep, roundish ; dor- 
sal fin with its anterior rays not thickened, elevated, their length about two thirds that 
of the base of the fin; origin of dorsal about midway between snout and base of caudal ; 
color pale; head 4 to 44; depth 24; D., 27; scales 8-39 to 41-6. Length one foot. 
Habitat, Great Lakes, abundant. 
Diagnosis.—This species may usually be known by the short body in 
connection with the comparatively low dorsal fin. 
Habits.—This fish is as yet recorded only from the great lakes. It is 
abundant in Lake Erie, and is sold by the fishermen as Carp, or some- 
times, especially after being split and salted, as Lake Shad. I have ex- 
amined many specimens from Sandusky Bay. 
do. CARPIODES BISON Agassiz. 
Long-headed Carp Sucker. 
Carpiodes bison, AGassiz, Am. Journ. Sci. Arts, 1854, 355; 1855, 190.—Copx, Proc. Am. 
Philos. Soc. Phila., 1870, 4&3.—JORDAN, Man. Vert., 1876, 297; 2d Ed., 1878, 322; 
Ball. U. S. Nat. Mus., ix, 1877, 50; xii, 1878, 197.—JoRDAN and COPELAND, Check 
List, 1876, 158.—JoRDAN and GILBERT, in Klippart’s Rept., 1876, 53. 
Ichthyobus bison, NELSON, Bali. No. 1, Ills. Mus. Nat. Hist., 1876, 49. 
Description. —Body oblong, the back not much arched; head quite long; muzzle elon- 
gate-conic, so that the eye is nearly median in position, the middle of the length of the 
head falling in front of its posterior margin ; eye large, 44 1n head; lips well developed ; 
anterior rays of the dorsal fin not thickened, not much shorter than the base of the fin; 
color pale; head 34; depth 3; D.,.27; scales 7-40-5, Length, one foot. 
Habitat, Ohio Valley, not very common. 
