TABLE OF CONTENTS. 
FIRST PART. 
Page. 
Preface, by the Commissioner IX-X 
Summary of the Scientific Results of the Fish Commission Expedition to Porto Rico, by Barton 
Warren Evermann XI-XV 
General Report on the Investigations, by Barton Warren Evermann 1-26 
The Fisheries and Fish Trade of Porto Rico, by William A. Wilcox 27-48 
The Fishes of Porto Rico, by Barton Warren Evermann and Millard Caleb Marsh 49-350 
The Mollusca of Porto Rico, by William Healey Dali and Charles Torrey Simpson 351-524 
SECOND PART. 
The Brachyura and Macrura of Porto Rico, by Mary J. Rath bun 1-127 
The Anomuran Collections, by James E. Benedict 129-148 
The Stomatopoda of Porto Rico, by Robert Payne Bigelow 149-160 
The Porto Rican Isopoda, by H. F. Moore 161-176 
The Cirripedia collected near Porto Rico, by Maurice A. Bigelow 177-180 
The Polychmtous Annelids of Porto Rico, by A. L. Treadwell 181-210 
Description of two new Leeches from Porto Rico, by J. Percy Moore 211-222 
The Nemerteans of Porto Rico, by Wesley R. Coe 223-229 
The Echinoderms of Porto Rico, by Hubert Lyman Clark 231-263 
The Alcyonaria of Porto Rico, by Charles W. Hargitt and Charles G. Rogers 265-287 
The Stony Corals of the Porto Rican Waters, by T. Wayland Vaughan 289-320 
The Actinians of Porto Rico, by J. E. Duerden 321-374 
The Sponges collected in Porto Rico in 1899, by H. V. Wilson 375-411 
The Foraminifera of Porto Rico, by James M. Flint 413-416 
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