The "Washington Zonal Chart"

(Click into chart to enlarge).

This document was found in Box 53 of the Kugler Archive at NMB in Basel in file Correspondence Hans Bolli. It is a compilation of Cretaceous through Cenozoic foraminiferal zonal markers and their internal codes used by T.L.L. in 1956. It provides cross-references to scientific names to species that were later published in the plates in Loeblich, Tappan et al. (1957). Studies in Foraminifera, U.S.N.M. Bulletin 215. Please note in this context, that in publications only scientific names were used, while sample numbers in reference- and study collections, that are deposited in various in museum collections around the world, bear often only internal T.L.L. codes.

See also the "Newton List", which is a complete list of benthic and planktic foraminiferal species used by T.L.L. in 1956, and which contains a translation of internal T.L.L. standard codes to scientific names. This list was found in Box 65 of the Kugler Archive at NMB in Basel in file "Miscellaneous papers by Bullen Newton".