I am looking for the published radiolarian percentage data from the surface sediments from the world ocean by Jim Hays & his colleagues at the LDEO.

The data set you are requesting is not available in the IRI Data Library. However, it may be available from the World Data Center for Paleoclimatology at the National Geophysical Data Center.

The CLIMAP data set is listed here:

http://www.ngdc.noaa.gov/paleo/datalist.html#paleoceanography

Within the "climap18" directory is a file named "rad_hays.txt", which might be related to your search. Please read the "readme" files within that directory or information which might be elsewhere on that website.

-- Michael Bell