Image source: Cushman, J.A. 1913. A Monograph of the Foraminifera of the North Pacific Ocean. Part III. Lagenidae. Bull. U.S. Nation. Mus 71: ix+125 pp.+47 pls.
Image source: Cushman, J.A. 1942. The Foraminifera of the Tropical Pacific Collections of the ”Albatross”. Part 3. Heterohelicidae to Buliminidae. Bull. U.S. Nation. Mus 161: v+67 pp.+15 pls.
