In spite of the extensive micropaleontological literature, there has been little systematic study of the second most stratigraphically useful microfaunal group---the ostracoda---from the type areas of the Jackson group. Many ostracodes have been described from the Jackson or its age equivalents in adjacent states, but for some reason those from the type sections of the Jackson have been neglected. It is the essential purpose of this paper to rectify this neglect and to provide another link in the chain of studies of the important Jackson faunal groups in the eastern Mississippi embayment.