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fossils in the compact white Oolite and the soft marly Oolite 
in Professor Hutu’s Section would enable us to make a better 
correlation of the beds. It may be that the strata alluded to 
as unseen are the brown beds of the Stroud Section. 
The Coral bed appears to have its limit southwards at 
Rodborough Hill. It occurs on the eastern escarpment in a 
broken up condition, but in the Ragstone quarry near the 
Fort, about 300 yards distant, it is absent, and it appears in the 
quarries on the south side of the Hill as a thin stratum only. 
Passing over beds 9 and 10 with the remark that No. 9, from its 
superior hardness, is less broken up than the beds above, and 
is, therefore, in the absence of fossils, a good guide to the 
examination of the series, we come to the Clypeus Grit, No. 8. 
This bed, which is of considerable thickness in Stroud Hill, 
is there comparatively unfossiliferous, Terebratula globata and 
Pholadomya Heraulti, being the prevailing Mollusca; but in 
Rodborough Hill it is charged with fossils, although the tough 
nature of the matrix and the circumstance of the test being 
extremely fragile, make it.a work of patient labour to collect 
many specimens. 
An oyster bed on the surface of the lower Clypeus bed at 
Rodborough indicates a pause in the deposits, and then follows 
a profusion of Terebratula globata. A stratum six inches 
thick is composed almost entirely of this shell; the next two 
feet of the deposits above are also largely composed of it. 
About 12 per cent of, the fossils of the Clypeus Grit are 
new, a large proportion belong to the Trigonia Grit, but 
nearly one half pass upwards into the Great Oolite. The 
assemblage of Testacea is considerable; I have collected up- 
wards of 90 species, and many doubtless remain undiscovered. 
The White Oolite—the uppermost of the series—has been 
already described. Its most abundant Fossil is Terebratula 
globata: in some places it is nearly destitute of fossils, but 
those which occur are well preserved. The bed at Stroud Hill 
is three feet thick, but at Rodborough it is five feet. 
The change that ensued in the condition of the Oolitic Sea 
after the formation of the Coral bed is very striking. The 
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