DISPERSION OF FRESH-WATER FISHES. 



93 



We now recognize about six hundred species 1 

 of fishes as found in the fresh waters of North 



1 The table below shows approximately the composition of the 

 fresh-water fish-fauna of Europe, as compared with that of North 

 America north of the Tropic of Cancer. (See a review of Seeley's 

 "Fresh Water Fishes of Europe," The Dial, Chicago, June, '86, p. 35.) 



FAMILIES. EUROPE. N. AMERICA. 



Lamprey .... Petromyzontidce . . 3 species. 8 species. 



Paddle-fish .... Polyodontidce ... " i " 



Sturgeon .... Acipcnseridce . . . 10 ' 6 " 



Gar-pike .... Lepisosteida ... ' 3 " 



Bow-fin Ami at idee .... ' I " 



Cat-fish Siluridce . . . . i ' 25 " 



Sucker Catostomidce ... ' 51 " 



Loach Cobitidce . . . 



Carp Cyprinidce . . 



Characin .... Characinidce . 



Moon-eye .... Hiodontidce . 



Herring Clupeidce 



Gizzard-shad . . . Dorosomida 



Salmon Salmonidce . 



Trout-perch . . . Pcrcopsidce . . 



Blind-fish .... Amblyopsid<& . 



Killifish Cyprinodontidce 



Mud-minnow . . . Umbrida . . 



Pike . , Esocida . 



230 

 i 

 3 

 5 

 i 



28 

 i 



5 



5 2 



5 



Alaska Black-fish . . Dalliidas . . . . " i 



Eel Angtiillidcc ... 2 " i 



Stickleback .... Gasterosteidee ... 3 " 7 



Silverside .... Atherinida .... 2 " 2 



Pirate Perch . . . Aphredoderidce . . " i 



Elassoma .... Elassomida ... " 2 



Sun-fish Centrarchidce ... " 37 



Perch Percidce n " 72 



Bass Serranidce . . . . i u 4 



Drum Sci(enid<c .... " I 



Surf-fish Embiotocidce ... " i 



Cichlid CicMida " 2 



Goby Gobiidce 2 " 6 



Sculpin ..... Cottid<z 2 " 21 " 



Blenny Blcnniida .... 3 " " 



Cod Gadida: i " i " 



Flounder .... Plcuronectidee . . . i " " 



Sole Soleidte i " i " 



Total: Europe, 21 families ; 126 species. North America, 34 families; 



587 species. 



According to Dr. Giinther (Guide to the Study of Fishes, p. 



243), the total number of species now known from the temperate 



