ABSTRACT: The J.W. Bailey Collection at the Farlow Herbarium of Harvard University holds type specimens of radiolarians from the sea off Kamchatka, or the present day Bering Sea, which he described in 1856 in his article: Notice of Microscopic Forms found in the soundings of the Sea of Kamschatka. Bailey described thirteen polycystine and two phaeodarian species,which are all recognized in the examined slide collection. In this paper the type specimens of the species described byBailey (1856) are photographed and illustratedwith some diagnostic information thatmay contribute to a refined taxonomic analysis.