The discovery of forty new fossil localities permits a better definition of the three faunal units of the Louisiana Sabine (Wilcox): the Sabinetown (youngest), Pendleton, and Marthaville beds (oldest). Fossils were collected from three Sabinetown outcrops, twenty localities of Pendleton age, and from seventeen localities which carried a Marthaville fauna. The study of these fossils substantiates the long-standing correlation of the Louisiana section with the marine Wilcox of Alabama. The presence of Ostrea multilirata Conrad, a guide fossil of the basal Wilcox Seguin formation of Texas, associated with Ostrea thirsae (Gabb) in the Marthaville beds is of importance because it establishes a connecting link between the basal Wilcox faunas of Alabama and Texas.

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