found in the North Atlantic
Geological Time: Quaternary Holocene recent
the drawings are published in the book cited below, author and collection:
View of a specimen of Mucronina compressa (Costa, 1855)
The identification is based upon:
Cushman, J., A., 1923: The Foraminifera of the Atlantic Ocean. Part 4. Lagenidae. Bull. U.S. Natl. Mus. 104. Smithsonian Institution United States National Museum Bulletin 104. Plate 20, Fig. 1-2