ESTHERIA-BED IN NORTH-WEST GLOUCESTERSHIRE. 76 
also his record of the thickness of the immediate subjacent 
deposit. The portions of the bed procured were of the 
varieties (2) and (4). 
At Bourne Bank, near Defford, a little within the 
boundaries of Worcestershire, the Estlieria-hQdi is exposed 
in the wood immediately to the north of the road from 
Upton-on-Severn to Defford, and is here a cream-coloured 
argillaceous limestone replete with Estheria and Naiadita 
lanceolata. At no other locality in this district have I 
found the Estheria so well preserved. 
Between Wainlode Cliff and the classic section at West- 
bury-on-Severn the same bed was seen in situ in a deeply- 
cut wheel- track about 500 yards south of the house known 
as “Highgrove,” a little north-east of Minsterworth, near 
Gloucester. Here the lithic structure was of the varieties 
(1) and (4) ; and it was in the first of these, and at the 
base of the bed — here 6 inches thick — that the Estheria 
and Naiadita chiefly occurred. The same bed was again 
discovered in the lane -cutting which traverses the Bhaetic 
and Liassic outlier of Denny Hill, and contained fish scales 
and Estheria. 
Garden Cliff affords the best exposure of the Estheria- 
bed. 
Four main lithic varieties may be again noticed similar 
to those at Wainlode Cliff, and may be seen passing hori- 
zontally from one variety to another. The prevalent tint of 
the bed when freshly fractured is greenish-grey, but soon 
weathers white. From a lithological standpoint the chief 
interest attaches to that variety simulating the markings 
in the Cotham Marble. These, as exhibited in the stratum 
at this locality, reach the upper surface, and have caused 
the sediment to be so arranged as to give rise to projections 
on that surface. From the true Cotham Marble, the nearest 
approach to it in the Estheria-h^d^ may be distinguished by 
