^D^teRTISEMENT. 
United States Commission of Fish and Fisheries, 
Washington^ D. C. 
Congress, by joint resolution of February 14, 1881, authorized the printing of an 
annual bulletin for the publication of new observations, discoveries, and aiiplicatious 
relating to fish culture and the fisheries. The previous numbers of this bulletin have 
been composed chiefly of short articles, extracts from the official correspondence, and 
translations of foreign papers. The increased operations of the Fish Commission dur- 
ing 1888 have made it iiossible, however, to apply the bulletin for that year almost 
exclusively to the results of the Commission’s work, and the present volume will be 
found to contain much original material of great importance to the different fishery 
interests. A. few changes have also been made in the printing of the volume which 
are considered to be advantageous. The size of the page has been slightly enlarged 
to afford the necessary space for suitable illustrations, and the unbound edition of 
the volume has been issued in the form of completed papers instead of by signatures 
as heretofore, thereby permitting of a more judicious distribution of its several parts. 
The present bulletin is the eighth of the series. 
MARSHALL McDONALD, 
Commissioner. 
HI 
