Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index / Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII

A thorough monographic treatment of Osculosa radiolarians—chiefly Nassellaria and Phæodaria—presenting systematic classifications and diagnostic descriptions of orders, families, genera, and species; detailed comparative morphology of central capsules, porous basal areas and podoconus structures, and siliceous skeleton types; extensive plates and measurements; and supporting material including notes on dimensions, habitat observations, addenda, errata, and an index for taxonomic reference.