If one were trying to find information available on the Radiolaria, one would normally be impeded by the fact that there are no handy modern publications on the subject. Literature on radiolarians is widely distributed and ranges from biological monographs to paleontological and stratigraphic books and papers; a synthesis was desperately needed. Prior to the publication of Radiolaria, there existed several books or monographs devoted only to taxonomy, classification, or other single aspects of the Radiolaria, but none of these here comprehensive enough to cover the entire field. One of the major goals of this book is to condense the data from the large body of literature on radiolarians into a concise treatise.