"Diagrams of Foraminifera. A, monothalamian; B, C, polythalamian; D, horizontal, and E, F, vertical sections of the helicoid forms." -Whitney, 1911

Diagrams of Foraminifera

"Diagrams of Foraminifera. A, monothalamian; B, C, polythalamian; D, horizontal, and E, F, vertical…