CONTRIBl'TIOXS fO THE NATL'IIAL HISTORY OF THE CETACEANS. 



A REVIEW 



OF THE 



FAMILY DELPHIl^ID^ 



BY 



FREDERICK W. TRUE, 



Curator of the Dvpnrtmrnt of Mammals, United States Xalioual Museum. 



AVITII FORTY-SEVEX PLATES. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



I 8 .> i) . 



