REVISION OF THE GENUS ESOX. 



83 



REVISION OF THE SPECIES BELONGING TO THE 

 GENUS ESOX, 



INHABITING LAKE ERIE AND THE RIVER OHIO. 



1, 



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BY PROF. J. P. KIRTLAND. 

 Read before the Cleveland Academy of Natural Science, February 7, 1854. 



Much confusion prevails in regard to 

 the species of this genus inhabiting the 

 waters of the State of Ohio. Asa portion 

 of it has occurred from some of my publi- 

 cations it seems appropriate that I should 

 attempt its correction. 



Gi^'ard has divided this genus into two 

 groups, which he thinks are distinguished 

 by organic differences. 



a. Pikes. — Cheeks and opercular appen- 

 dages smooth. 



h. Pickerels. — Cheeks and operculai 

 appendages scaly. 



Our species at present definitely recog 

 nized are the following, to wit: 



I. Esox NoBiLis. — Thompson. 



Thompson's Appendix to History of 



Vermont. 

 E. atro-maculata, Kirt., MSS. 

 E. estor, Kirt., description and 



figure. Vol. v., Boston Jour. Nat 



Science. 

 Muskallonge of the fishermen. 



Esox EsTOR. — Le Sueur. 



Le Sueur, Jour. Acad. Nat. Science 



Phil., Vol. I. 

 E. reticulatus, Kirt., Boston Jour., 



Vol. IV., figure and description, 

 Muskallonge, Le Sueur and DeKay 

 Pike of the fishermen. Esox umbrosus. 



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