X 
PREFACE. 
By joint resolution, approved May 14, 1900, Congress ordered the printing of a 
special edition of 7,500 copies of the general report of the expedition and of the 
parts relating to the fishes and fisheries. In compliance therewith the matter covered 
by pages 1 to 350 and plates 1 to 52 of the first part of this bulletin was issued as a 
Congressional document. 
A summary of the scientific results of the Porto Rican expedition has been pre- 
pared by Professor Evermann, and appears immediately after this preface. 
George M. Bowers, 
Commissioner. 
