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All illustrations except where otherwise noted are the work of Miss Joan Sischo.

The author expresses sincere appreciation to Dr. H. A. Boyd, Jr., for the use of illustrations of Vacaville species, to Mr. John Browning and William Grier for illustrations of Santa Susana species; to Mr. Theodore Cook and Dr. Richard Cifelli for illustrations of Devils Den Lodo species; and to Mrs. Bernice Y. Smith for illustrations of Foraminifera from the Pacheco Syncline “Martinez” and “Tejon” (Vine Hill, Las Juntas, Muir, and Alhambra) species.

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