FIBST SEEIES NO. 45 MARCH 15, 1921 



UNIVERSITY OF IOWA 

 STUDIES 



STUDIES IN NATURAL 

 HISTORY 



VOLU:\IE IX NUMBER 5 



REPORTS ON THE CRINOIDS, OPHIU- 

 RANS, BRACHYURA, TANIDACEA AND 

 ISOPODA,AMPHIPODS,^ECHINOIDEA 



of the Barbados- Antigua Expedition 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 mattear. Acceptance for mailing at special rates of postage 

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



