SMITHSONIAN MISCELLANEOUS COLLECTIONS. 



247 



ARRANGEMENT 



FAMILIES OF FISHES, 



OB 



CLASSES PISCES, MAKSIPOBKANCHII, AND 

 LEPTOCABDII. 



PEEPARED FOB THE SMITHSONIAN INSTITUTION" 



BT 



THEODOEE GILL, M.D., Ph.D. 



WASHINGTON: 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION. 



NOVEMBER, 1872. 



