Bate (1978, p. 254) commented of the Great Estuarine Group succession from the Inner Hebrides, Scotland (Fig. 1) that it ‘is so imperfectly known with respect to its ostracod fauna that it is one area in urgent need of investigation’. This was rectified by Wakefield (1991, 1994) in which the largest freshwater and brackish water ostracod fauna from the British Bathonian was described, particularly with respect to the number of darwinulid and lim-nocytherid species. However, the similarity with freshwater and brackish water ostracod assemblages recorded in the English Midlands, although generically high, was specifically low. Studies recording freshwater and brackish water ostracods from the English Midlands, and therefore of com-parative interest, are those of Bate (1965, 1967), Ware (1978), Stephens (1980), Ware & Whatley (1980), Ware & Windle (1981), Jacovides (1982), Timberlake (1982), Barrington (1986), and Stride (1994). Figure 2 illustrates the stratigraphical coverage of these studies and their overlap with the Great Estuarine Group succession. The development of such brackish water ostracod faunas during the Bathonian was discussed in Whatley (1990).
Lithostratigraphical correlation of Bathonian strata from the English Midlands highlighting successions from which freshwater and brackish-water ostracods have been analysed. The lithostratigraphy of the Great Estuarine Group, Inner Hebrides, Scotland, is also shown to enable an approximate correlation with the English successions. English stratigraphy after Bradshaw (1978), Torrens (1980b), Boneham & Wyatt (1993),