ZOOLOGY, 



721 



Fish-like Vertebrates. 



North American fresh-water fishes. — In the account of progress in 

 zoology in the year 1882, the character of the fresh- water fish-fauna of 

 Australia was referred to and its few genera enumerated. It was shown 

 that only five true fresh-water families existed, and that but one had 

 more than one or two species, and that only seventeen. • The revision 

 of the North American fishes, by Jordan and Gilbert, enables us to con- 

 trast the rich fresh-water fauna of temperate and northern America 

 with the poor Australian one. Not less than 617 species have been 

 recognized, and these represent 143 genera and thirty-four families. 

 The families and sub-families only can be mentioned here, but their 

 enumeration will suffice to give a good idea of the characteristics of the 

 fauna. 



Families and sub-families. 



PetromyzontidaB 



Poly odont idse 



Acipenseridae: 



AcipenserinsB 



Scapkirhynchopinaa 



Lepidosteidae 



Ainiidae 



Siluridae : 



IctalurinaB 



Catostoruidae: 



IchthyobinaB 



Cycleptinae 



Catastominae 



Cyprinidae: 



Canipostoniinae 



Chondrostominae.. . 



Exoglossinae 



Leuciscinae 



PlagopterinaB 



CyprininaB 



CharacinidaB 



Hyodontidae 



Clupeidse 



Dorosomidse 



Argentinidse 



Salnionidas : 



Coregoninae 



Salmoninae 



Thymallidae 



O 



Families and sub-families. 



10 Percopsidae 



1 Amblyopsidae 



Cyprinodontidae . .. 



1 Umbridae 



1 Dalliidae 



3 Esocidae 



1 AnguillidaB 



Gasterosteidae 



26 Atberinidae 



Apbredoderidae . .. 



9 Elassornidae 



1 Centrarchidae: 

 49 Centrarchinae . . 

 Lepominae 



4 Micropterinae.. , 

 24 Percidae : 



1 Etbeoetominae.. 

 234 Percinse 



4 Labracidae 



2 Sciaenidae: 



1 Haplodinotinae . 



3 EmbiotocidaB: 



6 Hysterocarpinae 



1 Cicblidae 



1 i Cottidae: 



Uranideinae 



12 Gadidte 

 18 Lotinae 



1 



1 

 5 



20 

 1 

 1 

 5 

 1 

 8 



21 

 1 

 1 



3 



33 



2 



67 

 3 

 4 



22 

 1 



The only families of this list which have also true marine species are 

 fifteen — the Petromyzontids, Silurids, Clupeids, Dorosomids, Argenti- 

 nids, Salmonids, Cyprinodontids, Anguillids, Gasterosteids, Atherinids, 

 Labracids, Scisenids, Embiotocids. Cottids, and Gadids. The fresh- 

 water species and even genera of most of these families are, however, 

 to a large extent, peculiar to the interior waters ; of the others, (1) some 

 are anadromous, like certain of the Salmonids, Clupeids, and Labracids J 

 (2) others inhabit fresh and salt water almost indifferently, as the Do- 

 ll. Mis. 69 46 



