TABLE OF CONTENTS. 



Page 



Preface v 



Introduction xxv 



General Topography and Hydrography of Mexico xxv 



Recent Geological Changes in Mexico and their General Effect on 



the Fish Fauna xxvii 



List of Localities in Mexico where Collections of Fishes were Made 



by F. E. Lutz and the Author in 190 1 xxviii 



List of Localities in Mexico where Collections of Fishes were Made by 



the Author in 1 903 xxix 



The River Systems of Mexico and a List of Fishes Known from Each . xxx 



Rio Grande System xxx 



Rio Grande and its Present Tributaries in Mexico xxxi 



Rio Casas Grandes xxxii 



Rio Santa Maria xxxiii 



Rio Carmen xxxiii 



Rio Sauz xxxiii 



Lago de Castillos xxxiii 



Rio Nazas xxxiii 



Rio Conchas System xxxiv 



Rio Soto la' Marina System xxxiv 



Rio Panuco System xxxvi 



Rio Mezquital System xxxvii 



Rio Presidio System xxxviii 



Rio Yaqui System xxxviii 



Rio Sonora System xxxix 



Colorado River System xxxix 



Lower California xxxix 



Rio Grande de Santiago System xxxix 



Valley of Mexico xli 



Rio San Francisco System xli 



Las Lagunas near Vera Cruz xlii 



Boca del Rio System xlii 



Rio Blanco System xliii 



Rio Otopa System xliii 



Rio Papaloapam System xliv 



Rio San Geronimo System xlv 



Rio Tehuantepec System xlv 



Rio Verde System xlv 



Rio Balsas System xlv 



List of Fishes from Various Localities not Referable to any of 



the River Systems Named Above xlvi 



Geographical Distribution of Fresh-Water Fishes of Mexico xlvi 



Shore Fishes which have Become More or Less Established in the 



Fresh Waters of Mexico Hi 



Game Fishes of Mexico lii 



Food Fishes of Mexico liii 



