Abstract
Formational names of rock units of the Lower Tertiary Libya Group in Egypt are introduced. The planktonic foraminifera of the Thebes Formation, Libya Group from the type locality at Luxor, Egypt are described and illustrated. The planktonic foraminifera found in the underlying Esna Shale are described. The Esna Shale in Luxor, having a fauna of sharply keeled Globorotalia species, is considered to be of upper Paleocene (Landenian) age. The overlying Thebes Formation contains a planktonic fauna of smoother and more compressed types: Globorotalia thebaica, n. sp., G. imitata Subbotina and G. planoconica Subbotina. The Thebes Formation is believed to represent the open sea facies of the Egyptian
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