A SYSTEMATIC ARRANGEMENT OF THE FISHES OF NORTH AND 

 MIDDLE AMERICA, 



In these pages the authors exhibit, as clearly as the method will permit, their present 

 views as to the" genetic relations of the fishes and fish-like vertebrates of North and Middle 

 America. This list is, in fact, a Table of Contents complete for the four volumes and 

 corrected to include the Addenda (pp. 2745-2873 of Part III and pp. 3137-3197 of Parti Y). 

 From this Systematic Arrangement it is seen that the fish fauna of North and Middle 

 America, as now understood by the present authors, embraces 3 classes, 30 orders, 225 

 families, 1113 genera, 325 subgenera, 3263 species, and 133 subspecies. 



Page. 



CLASS LEPTOCAEDII 2 



ORDER AMPHIOXI 2 



Family Bmnchiostomidce 2 



Genus Branchiostoma, Costa '. 3 



lanceolatuui (Pallas) 3 



caribaeum, Sundevall 3 



californiense, Gill 4 



Genus Asymmetron, Andrews 4 



lucayanum, Andrews 4 



CLASS MABSIPOBRANCHII 4 



ORDER HYPEROTRETI 5 



Family Heptatremidce 5 



Genus Polistotrema, Gill 6 



stouti (Lockington) 6 



Family Myxin ,dce 7 



Genus M/xine, Linnaeus 7 



glutinosa, Linnaeus 7 



ORDER HYPEROARTII 8 



Family Petromyzonidce 8 



Genus Bathymyzon, Gill 9 



bairdii (Gill) 9 



Genus Petrorayzon ( Artedi) Linnaeus 9 



marinus, Linnaeus 10 



unicolor (De Kay) 10 



Genus Ichthyomy zon, Girard 10 



concolor (Kirtland) 11 



castaneus, Girard 11 



Genus Entosphenus, Gill 11 



tridentatus (Gairdner) 12 



camtschaticus (Tilesius) 2745 



Genus Lampetra, Gray 12 



aurea (Bean) 13 



spadicea, Bean 13 



cibaria ( Girard; 13 



wilderi, Gage 13 



CLASS PISCES 14 



SUBCLASS SELACHII 15 



ORDER DIPLOSPONDYLI 16 



Family Chlamydoselachidca 16 



Genus Chlamydoselachus, Gartnan 16 



auguineus, Garman , 16 



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