798 



BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



1846— ^sox reticulatus Kirtland, Boat. Journ. Nat. Hist, v, 233, pi. 10, f. 2. (Not of 



Le Sueur ; first carefully distinguished from the Muskallunge.) 

 1846 — f Esox deprandus (Le Sueur) Cuv. & Val. xviii, 336. 



? Esox deprandus Cope, Proc. Ac. Nat. Sci. Phila. 79, 1865. 



P Esox deprandus Cope, Trans. Am. Philos. Soc. 408, 1866. 



? Esox deprandus Gunther, Cat. Fishes Brit. Mus. vi, 2, 1867. 

 18n0 — Esox bo7'eu8 Agassiz, Lake Superior, 317, 1850. ■ 



Esox lucioides Auct. 



The Common Pike is very abundant in all waters of Northern Asia, 

 Northern Europe, and of North America north of about the latitude 

 of the tributaries of Lake Erie, to Quincy, 111., and northwestward to 

 Alaska. It is one of the very few fresh-water fishes common to the 

 eastern and western continents. I have carefully compared Swedish 

 and American specimens, and I am unable to detect any specific differ- 

 ences whatever. No other strictly fresh-water species is known to be 

 common to Europe and America. I have, however, little doubt of the 

 identity of the American Lota maculosa (Le S.) with the European Lota 

 mdgaris Cuv. In this case, the American species has the prior name.* 



The number of nominal species of the genus Usox is greatly in excess 

 of the number of definable forms. Those apparently worthy of recog- 

 nition may be grouped in three subgeneric sections as follows : — 



I. Mascalongus Jordan : Species of the largest size, witli the branchiostegals in in- 

 creased number (17 to 19), and the lower half of the cheeks and of the opercles bare' 

 of scales; coloration dark-spotted on a lighter ground. "Muskallunges.".. wo&iZior. 



II. Esox Linnteus : Species of large size, with the branchiostegals 15 or 16 in 

 number; coloration pale-spotted on a darker ground ; fins black-s'^otted. "Pikes.' 



lucius. 



III. PicoEELLUS Eafinesque : Species of medium or small eize, with the branchioste- 

 gals 12 to 15 in number ; coloration reticulated or barred with dark green on a lighter 

 ground or nearly plain. " Pickerels." 



reticulatus, americanus, raveneli, cypho, salmoneus. 



Family ETHEOSTOMATID^ 



Genus ALYORDIUS Girard. 



18,— ALVORBIUS MACULATUS Girard. 



Black-sided Darter. 



l8il—Etheostoma bler.nioides Kirtlanb, Boston Journ. Nat. Sci. iii, 348. (Not of Eaf.) 

 Etheostoma hlennioides Storkr, Syu. Fishes N. A. 270, 1846. 

 Etheostoma hlennioides AG., Amer. Journ. Sci. Arts, 305, 1854. 

 Etheostoma hlennioides Cope, Proc. Ac. Nat. Sci. Phila. 233, 1864. 

 Etheostoma hlennioides Vaillant, Eecherches sur les Poissons, etc. 70, 1873. 



* This conclusion has been already independently reached by Dr. T. H. Bean of the 

 Smithsonian Institution. 



