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 V). 
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 LEPTOCAP.DII 2 
Oedek Amphioxi 2 
Family Branchiostomidce 2 
Genus Branchiostoma, Costa 3 
lanceolatum (Pallas) 3 
caribEeum, Sundevall 3 
californiense. Gill 4 
Genus Asymmetron, Andrews 4 
lucayanum, Andrews 4 
CLASS MABSIPOBRANCHII 4 
Order Hyperoteeti 5 
Family Heptatremidce 5 
Genus Polistotrema, Gill 6 
stouti (Lockington) 6 
Family Myxiiv',dce 7 
Genus Myxine, Linnjeus 7 
glutinosa, Linnseus 7 
Order Hypeeoartii 8 
Family Petromyzonidce 8 
Genus Bathymyzon, Gill 9 
hairdii (Gill) 9 
Genus Petromyzon (Artedi) Linnseus 9 
marinus, Linnteus 10 
unicolor (De Kay) 10 
Genus Ichthyomyzon, Girard 10 
concolor (Kirtland) 11 
castaneus, Girard 11 
Genus Entosphenu.s, Gill 11 
tridentatus (Gairdner) 12 
camtschaticu»(Tilesius) 2745 
Genus Lampetra, Gray 12 
aurea (Bean) 13 
spadicea, Beau 13 
cibaria (Girard; 13 
wilderi. Gage 13 
CLASS PISCES 14 
SUBCLASS SELACHII 15 
Order Diplospondy'li 10 
Family Chlamydoselachidce 10 
Genus Chlaraydoselachus, Garmaii 10 
anguineus, Garmau 10 
