CONTENTS. 



InTRODUCTIOiN' V 



Maps showing the Geographical Distribution of Fresh-water Fishes in Mexico and 



Central America. 

 List of Plates xxxiii 



Teleostomi. 



Teleostei, 



Acanthopterygii 1 



LoPHOBRANCHIl 54 



Percesoces 56 



Haplomi 74 



Apodes 109' 



Symbranchii 110 



ostariophysi 110 



Malacopterygii 176 



GiNGLYMODI . 180 



Selachii. 



EuSELACHII. 



Pleurotremata 182 



Hypotremata 183 



Cyclostomata. 



Hyperoartii 184 



Supplement 185 



Index . 193 



Plates. 



a 2 



