1, Esox. 229 



priBoperculum is covered with scales, while in the E. nobilior the 

 lower half of the check is entirely naked. 



Mr. Cope, Proc. Acad. Nat. Sc. Philad. 1865, p. 79, refers E. estor, 

 Lesueur, to E. luciiis, but adopts E. nobilior, Thompson, which, he 

 says, has not the frontal groove which is distinct in E. lucius. He 

 has also counted nineteen branchiostegal rays in E. nobilior. 



3. Esox depraudus. 



Esox depraudus {Lesueur), Cuv. Sf Val. xviii. p. 33G. 

 B. 15. D. 22. A. 21. 

 Opercles scaly. Brownish-green, with numerous oblong or rounded 

 spots ; fins with black spots. 

 Wabash River. 



If this fish really has the opercles scaly, it cannot be identical with 

 E. estor of Bichardson, as Valenciennes supposes, the latter having the 

 opercles scaleless, as is quite evident from Bichardson's description. 



4. Esox reticulatus. 



? Esox lucius, Schnpf, Naturf or seller, xx. 1784, p. 26. 



? Esox americanus, Lacep. v. p. 299. 



Esox lucius, var., Mitch. Lit. Sf Phil. Trans. Netv York, i. p. 440. 



Esox reticulatus, Lesueur, Journ. Acad. Nat. Se. Philad. i. 1818, p. 414; 



Storer, Report Fish. Massach. p. 97; Kirtland, Zool. Ohio, ]). 194; 



Dekay, Ncio York Faun. Fish. p. 22:i, pi. 34. fig. 107 ; Cuv. S,- Val. 



xviii. p. 327 ; Coj)e, Proc. Acad. Nut. iSc. Philad. 18G5, p. 79. 



B. 15. D. 17-19. A. 17. P. 15. V. 10. L. lat. 120-130. 



Operculum and suboperculum entirely covered with scales. The 

 length of the head is contained three times and one-fifth in the total 

 (without caudal). The width of the band of vomerine tooth behind 

 the middle of its length is one-half of that of the palatine band, and 

 less than that of the maxillary. Sides with an imperfect network 

 of brown streaks ; a very distinct black suborbital band. 



United States. 



a. Half-grown. Boston. Presented by B. Winstone, Esq. 



b, c-d. Half-grown. New York. 



5. Esox niger. 



Esox scomberius, Mitchill. 



Esox niger, Lesueur, Journ. Ac. Nat. Sc. Philad. i. p. 41u. 



americanus, Cuv. ^ Val. xviii. p. 329 (not Lacep.). 



fasciatus, Bekay, New York Fauna, Fish. p. 224, pi. 34. fig. 110 ; 



Cope, Proc. Acad.' Nat. Sc. Phil. 1865, p. 79. 

 ? Esox tredecim-radiatus, Mitchill, Mirror, 1825, p. 361 ; Dekay, I. c. 



p. 225. 



D. 14-15. A. 14. V. 9. 



Operculum and suboperculum entirely covered with scales. Eye 

 nearer to the end of the upper jaw than to the margin of the oper- 

 culum ; a deep frontal groove. Vomerine teeth in a shorter series 



