228 ESOCIDiE. 



q. Young: stuffed. Mauritius (introduced). Presented by Mr. 

 Telfair. 



r. Large female : skeleton. Lough Earne, Ireland. Presented by 

 the Earl of Enniskillen, 



s. Adult : skeleton. England. Purchased of Mr. Warwick. 



t. Half-grown : skeleton. Rhine. From Dr. A. Giinther's Collec- 

 tion. 



u. Adult: skeleton. Lake of St. Stephanos. Purchased of Mr. 

 MiUingen. 



American specimens. 



These specimens have generally seventeen anal rays, and but ex- 

 ceptionally nineteen ; whilst the European examples have nineteen, a 

 less number being found very rarely. There is also a faint bro^^^lish 

 vertical suborbital band, traces of which may be observed sometimes 

 in European examples. 



a. Forty-two inches long: stuifed. Albany River. Presented by 



Sir J. Richardson. 

 h-c. Adult : stuffed. Arctic Expedition. 



d. Adult : stuffed. Arctic North America. Presented by J. Rae, 



Esq. 



e. Half-grown. Lake Whittlessey, Michigan. (Collected by J. H. 



Slack.) 



Valenciennes describes under the name of Esox austraUs (Cuv. «fe 

 Val. xviii. p. 323), a specimen in the Paris Collection said lo have 

 been brought by Peron from Van Diemen's Land. I need not men- 

 tion that, if this is really the case, it must have been an example 

 introduced from Europe, and that no true Esox is indigenous m the 

 fresh waters of Australia. 



2. Esox estor. 



Muskellunge ; Maskinonge. 



Esox estor, Lesucur, Journ. Acad. Nat. Sc. Philad. i. 1818, p. 413 ; 



Richards. Faun. Bor.-Amer. iii. p. 120; Dekay, Neio York Faun. 



Fish. p. 222 ; Cuv. Sf Val. xviii. p. 824, pi. 542. 



B. 18. D. 21. A. 20-21. P. 12. V. 11. L. lat. 162 (135). 



Subopcrculum and lower part of operculum scaleless. The band 

 of vomerine teeth much narrower than in E. hicius. Body with large 

 rounded whitish spots ; vertical fins with dark spots. 



Lakes Erie and Huron, and southern Canadian waters. 



The principal differences between this species and the American 

 E. lucius appear to be the greater number of anal rays, and the nar- 

 rower band of vomerine teeth. 



Two species are perhaps confounded under the name of E. estor ; 

 one, the true Muskellunge, is named E. nohilior by Thompson, Proc. 

 Best. Soc. Nat. Hist. iii. 1850, i)p. 1(53, 173, and 305. This author 

 says that the most obvious mark by which the two species may be 

 distinguished is this : in E. enter the whole cheek in front of the 



