Sidebottom, H. (1905). On Nevillina, a new genus of Foraminifera. Memoirs and proceedings of the Manchester Literary and Philosophical Society. 49(11): 1-4., available online at (https://www.biodiversitylibrary.org/item/111132#page/155/) page(s): p. 1 pl. 1 fig. 1-8
Image source: Cushman, J.A. 1917. A Monograph of the Foraminifera of the North Pacific Ocean. Part VI. Miliolidae. Bull. U.S. Nation. Mus 71: vii+108 pp.+39 pls.