and its Tributaries. 967 
C. elongatus. Le Sueur. Missouri Sucker. Black Horse 
of the fishermen. 
koci elongatus. Le Sueur. Jour. Acad. Nat. Sc. Vol. I. p. 103, and fig. 
niger. af. - Jch. Ohiensis, p. 56. 
i elongatus. Le Sueur. Kirtland's Report, oe 169, 192. 
:: s " Dekay's Report, p. 2 
A " e Hist, Nat. des a t. xvii. p. 455. 
Plate XIX. Fig. 3. 
Head conic-cylindrical, elongate, and glaucous. Nose pro- 
jects beyond the mouth ; nostrilsdouble, circular, the anterior 
smaller. Mouth small, semicircular ; lower lip with promi- 
nent papillæ, posterior edge acute.. Eyes small, circular ; 
iris narrow, yellow or silvery. The head is one-sixth of the 
total length, and narrower than the body. - 
Body regularly fusiform, gradually widening from the base 
of the head to the dorsal fin; and, from thence to the tail, 
more gradually tapering. At the dorsal, the diameter of the 
body is one-fifth the total length. Abdomen full between the 
Pectoral and ventral fins, and the body cylindrical at d 
point, 
Dorsal fin long, equal to one-third the length of the fish, 
low, with its anterior portion elevated and falciform. It 
extends posteriorly as far as the anal fin. 
Caudal fin acutely lunated, the superior lobe the longer 
and narrower, scales eiktend upo the base and terminate 
abruptly. 
Anal fin small, trapezoidal, scaly upon its base. 
Ventral and pectoral fins falcate. 
Color. The head dusky above, coppery on. its sides. 
Back black, often slightly mottled. Sides and eiit lusk, 
cupreous. Fins dusky and livid. or 
Gcrm 2 to 3 feet, and weighing. iia Q to 15 pounds. 
Hab. Ohio River. 
D. 35; C. 18; A. 8; V. 9; P. 15 rays. 
Observations, This singular fish is not uncommon in the 
Cincinnati market at certain seasons of the year, — in 
