1. Esox. 229 



prseoperculum is covered with scales, while iu the E. nohilior the 

 lower half of the cheek is entirely naked. 



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

 Lcsuenr, to E. hmus, but adopts E. nohilior, Thompson, which, he 

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

 has also counted nineteen branchiostegal rays in E. nohilior. 



3. Esox depraudns. 



Esox depraudus (Lesueur), Cuv. Sf VaL x\iii. p. 33(3. 

 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 reaUy has the opercles scaly, it cannot be identical with 

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

 opercles scaleless, as is quite e\ident from llichardson's description. 



4. Esox reticnlatus. 



? Esox lucius, Schopf, Naturforscher, xx. 1784, p. 26. 



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



Esox lucius, var., Mitch. Lit. Sf Phil. Trans. New Yorh, i. p. 440. 



Esox reticulatus, Lesiiexr, Journ. Acad.. Nat. Sc. Philad. i. 1818, p. 414; 



Storcr, Report Fish. Massach. p. 97; Kirtland, Zool. Ohio, p. 194; 



Dekay, New York Faun. Fish. p. 223, pi. 34. fig. 107 ; Cuv. c\ Val. 



xviii.'p. 327 ; Cope, Proc. Acad. Nat. Sc. Philad. 1865, 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 

 (\vithout caudal). The width of the band of vomerine teeth 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. 

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



5. Esox niger. 



Esox scomberius, Mit chill. 



Esox niger, Lcsueiir, Journ. Ac. Nat. Sc. Philad. i. p. 415. 



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



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



Co2)e, Proc. Acad. Nat. Sc. Phil. 1865, p. 79. 

 ? Esox tredecuu-radiatus, MitchiU, 3Iirror, 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 froutal groove. Vomerine teeth in a shorter series 



