A2 GASTEROPODA OF THE INFERIOR OOLITE. 
or less a repetition, on a reduced scale, of the Bradford Abbas section. Gastero- 
poda from more than one horizon are far from scarce. The Lower Division 
preponderates. 
Stoford Sands Quarry.—No Gasteropoda are known to me from here, but it is 
interesting as containing a shell-bed about forty feet below the Inferior Oolite 
Limestone with Am. radians, Am. Moorei, &c., plainly showing where the horizon 
of the Gloucestershire Cephalopoda-bed must be sought. Mr. H. B. Woodward 
considers that these shell-beds occur at more than one level in the Yeovil Sands. 
Braprorp Appas.—There has been more than one quarry worked in this parish ; 
and it can hardly be doubted that many of the fossils from these quarries and 
from Stoford, &c., are labelled and quoted ‘‘ Yeovil,” which town happens to be on 
the Middle Lias. 
Although there is only about twelve feet of limestone here, the life-history of 
the Inferior Oolite is well represented in this quarry, which may be compared with 
the cliff section at Burton Bradstock (Profile No. 1) of about the same thickness. 
I have no Gasteropoda from the lowest or opalinus-zone, if indeed it occurs here, 
but the Paving-stone bed is an excellent repository of the fossils of the Murchi- 
sone-zone, which may be also proved in the railway-cutting, a short distance to 
the south. Thirteen inches of stone in this quarry are the Dorsetshire represen- 
tatives, in all probability, of most of the fimbria-stage of the Cotteswolds. This 
may be shown by the Ammonites. The resemblances between the Gasteropoda 
of the two regions is less obvious. Indeed, we are never so strongly reminded of 
the differences between the two districts as at Bradford Abbas, because it is here 
that the Murchisone-zone has been most successfully worked for fossils, so that 
comparisons are more possible than elsewhere. 
The following is an extract from an Excursion Report of the Geologists’ Asso- 
ciation’ with reference to this bed. ‘ The ‘ Paving-stone bed’ is a slabby ironshot 
Oolite, which comes off just above the ‘ Dew-bed,’ and is used for gutters, &c. 
The true Harpoceras’ Murchisone occurs here, as also the var. Bradfordiensis, 
S. 8. Buckman. That author says of H. Murchisone that it marks a distinct zone 
which is just on the top of the Sands or passage-beds. This zone is about a foot 
thick at Bradford Abbas, but about three or four feet at Corton and Hawthorn 
Downs.” At Bradford Abbas the Gasteropoda of this zone are in fairly good 
spathic condition, though not equal to the bed above. The matrix is a rather 
harsh calcareous rock, yellowish for the most part where the iron is peroxidised, 
and moderately ironshot. Sometimes the shells have perished considerably. It is 
not at all times certain that the fossils have not been mixed somewhat with those 
from the bed above, with which no doubt they are closely allied. Certain genera, 
however, are greatly predominant, such as Cirrus, though this is probably less 
1 «Proceed.,’ vol. ix, No. 4. 2 Now called Ludwigia. 
