79 
and its Tributaries. 343. 
È à ; " T 
and black; irides silvery, not conspicuous. Mouth 
oval, concave, with series of inflected teeth regularly ^ wá 
radiated from the circular opening of the fauces, and n 2 
a distinct line of teeth surrounding the lower fourth dia 
of the same opening ; the inner teeth of the radiated 
series the largest. Chin, a triangular depression. 
Branchial openings seven, with a | gorrespendin ' 
black. dot above each; each ope larger than the 
eye. EN. 
Body cylindrical, pP An towards the back. " 
Dorsal fin two fifths the length of the fish 
pressed, but not interrupted above and anterior to 
vent, then continuous as the caudal fin, and extend- 
ing beneath the tail along its carinated edge, one 
inch; its.caudal portion flattened and queers to- 
wards the tip. v A 
r. Back ash-gray ; sides and beneath, recy 
aculated with irregular rows of black dots. . 
E 11 inches ; widest diameter of the body. 
ine-tenths of an inch. 
E Big Miami. 
Observations. 'This species is readily disting spiched,. 
from the P. Americanus and the nigricans of Les., 
and the nigrum of Raf. My specimen was found 
attached to the side of a large Ohio salmon (Lucio- 
Perca Americana). This species is of a larger size ` 
in Lake Erie than in the river Ohio. 
; de- 
breit 
* 
