FIKST SEEIES NO. 45 MAECH 15, 1921 



UNIVERSITY OF IOWA 

 STUDIES 



STUDIES IN NATURAL 

 HISTORY 



VOLUME IX NUMBER 5 



REPORTS ON THE CRINOIDS, OPHIU- 

 RANS, BRACHYURA, TANIDACEA AND 

 ISOPODA,AMPHIPODS,<^ECHINOIDEA 



of the Barbados- Antigua Rxpedition of 1918 



PUBLISHED BY THE UNIVERSITY, IOWA CITY 



Issued semi-monthly throughout the year. Entered at the post office at Iowa City, 

 Iowa, as second class matter. Acceptance for mailing at special rates of postage 

 provided for in section 1103, Act of October 3, 1917, authorized on July 3, 1918. 



