65 GASTEROPODA OF THE INFERIOR OOLITE. 
of the beds which have yielded Gasteropoda in the country between Cheltenham 
and Bourton, more especially near Notgrove Station and Aston Farm. 
Norcrovn, Astoy.—The Gasteropoda obtained from this neighbourhood are 
from two distinct horizons, viz. the Oolite Mar] and the Trigonia-grit. The annexed 
profile is not intended to grapple either with the stratigraphy or the actual 
development of the Inferior Oolite as displayed in the interesting cuttings and 
quarries between Notgrove and Bourton, but simply to show the relative positions 
of the beds containing Gasteropoda. 
There is a very fine development of the Oolite Marl at Notgrove Station, 
indeed I am not aware of a finer one anywhere. The lowest beds visible swarm 
with Brachiopoda, 7’. fimbria, T. curvifrons, Wald. Leckenbyi, Rhynch. Lycetti, &e., 
The lowest hard bed associated with these contains an immense Pseudomelania, 
which at present I cannot differentiate from ‘* Chemnitzia”’ simplex, M. and L. 
Then comes another soft bed swarming with Brachiopoda, and then another hard 
bed full of immense specimens of Natica cincta, nearly all as casts. This latter is, 
above all others, the ‘‘ Leitfossil’ of the Oolite Marl, and may be traced on the 
same horizon through the Lincolnshire Limestone into the Whitwell Oolite of 
Yorkshire, whence came the specimen figured by Philips. It is interesting to find 
that both these great fossils are recorded by Mr. Walford from Combe Hill, an 
outler of Inferior Oolite some four and twenty miles to the east-north-east of 
Notgrove Station, and close to the Cherwell Valley; but there the characteristic 
Brachiopods are scarce. 
The upward sequence from this very fine development of the Oolite Marl is 
not precisely clear. We should naturally expect the Upper Freestones, but in the 
cutting near Aston Farm, whence the bulk of the Gasteropoda marked ‘“ Aston” 
are derived, a series of imperfect Freestones, associated with two beds of Gryphites, 
immediately underlies the Ragstones. Whatever these beds represent it is clear 
that the Gasteropoda found in this cutting and the neighbouring quarries lie at 
the base of the Parkinsoni-zone, or, it may be, ina thin band whichis a little lower, 
since they are mostly found at the base. On the whole, however, I incline to the 
belief that they belong to the lower part of the Parkinsoni-zone, an horizon we 
have found so rich in Gasteropoda throughout both the Dorset and Cotteswold 
districts. Both in development and state of preservation they are far inferior to 
fossils from more favoured localities. A smooth Cerithiwm is one of the most 
abundant and characteristic Gasteropods. 
Résumé of the Cotteswold Hills. 
Considering the great development of the Inferior Oolite in this range the 
paleontological results on the whole are very inferior to those of No, | district, 
