84 



and reticulated veins forming an hexagonal network. Body en- 

 tirely olive brown. 



Plaiirostra cdentula, Lcsucur in Journ. Ac. Nat. Sc. Phila- 

 delphia, Volume 1, page 229. 



This fish is still more rare than the foregoing, but found oc- 

 casionally as far as Pittsburgh. It is larger, reaching from 3 to 

 5 feet and 50'bs weight. Not very good to eat. It has been so 

 fully described by Lesueur, that I need not do it again. The 

 individual which I saw. was 40 Jachea long, head 20 inches, 

 snout 1 1 inches long and 1\ wide at the end, hardly cuniform. 

 Eyes exceedingly small and round. Gill cover oval radiated 

 ns in the Sturgeons, with a short membranaceous flap, reachiug 

 only beyond the pectoral fins, See. It is also called, along with 

 the foregoing, Oar fish and Spatula fish. 



XXXV r Genus. Lamprey. Petromyzon. Lamproie. 

 Body cylindrical scalcless, vent posterior. Two dorsal fins 

 and a caudal fin, no other fins. Seven branchial round holes on 

 each side of the neck. Mouth terminal inferior acutiform, 



toothed. - .^ 



There are two or three species of Lampreys in the Ohio; but 

 they are ^rery -scarce and I have only^sccn one as yet. 



104th Species. Black Lamprey. ■ HfUrtunuzaii ^ipr^ru 

 Lamproie noire. 



Entirely blackish, tail oval acute, second dorsal over the vent * 

 several rows of teeth. 



A very small species, from four to five inches long; it is found 

 as high as Pittsburgh. Dorsal tins shallow, and distant from 

 each other and the tail. Eyes round and large. Branchial 

 holes small. No kuetal line. Mouth -oval, teeJh white a"c< 

 yeHow. It torments sometimes the Buftalee fish and Sturgeons, 

 \rpon which it fastens itself, It is nevor found in sufiicicn; 

 quantity to be used as food. ... _ 



