Abstract
American Tertiary species of the following genera are here briefly considered: Nummulites, Operculina, Heterostegina, “Orthophragmina” under which are included Discocyclina, Asteriacites, and Pseudophragmina, Lepidocyclina and its allies, Helicolepidina (Spiroclypeus) , Miogypsina, Orbitoelypeus ?, Dictyoconus, Orbitolites ?, Orbiculina, Sorites, Peneroplis, and Alveolina.
The records of the American species as given in this paper are not complete. I have selected for reference only those publications which seemed essential for nomenclatorial and stratigraphic purposes, and in order to make the bibliography as short as possible I have listed only the later comprehensive papers and in them fuller references must be sought. For instance, the titles of the papers by Schlumberger are contained in the memoirs by P. Lemoine and E. Douville. I have also omitted references to the volumes on the geology of the Dominican and Haitian republics and to important papers by L. Rutten, A Tobler, and others. rust, however, that. . .
