94 LOWER OOLITIC BOOKS OF ENGLAND : 
with shelly layers here and there, but no marked beds ; Trigonia, 
Lima, Pectcn demissus, and Corals occur, but no Ammonites nor 
Belemnites were to be seen. The stone is quarried for road-metal. 
Proceeding towards Camerton, brown sandy shelly and slightly 
oolitic limestone was exposed in the road-cutting ; lower down 
rubbly beds with ochreous marl and clay much tumbled occur ; 
and hereabouts comes the junction with the Lias. 
Other pits on Clan Down showed pale oolite resting on 
compact brown sandy and oolitic limestone, with ochreous exterior, 
and shelly in places. Here Ammonites Parkinsoni ? Rhynchonella 
spinosa, Avicula Munsteri, and some other fossils were obtained. 
Referring to the same locality Mr. Hudleston notes shell-beds 
with Trigonia, Nerincea Guisei, Natica bajocensis, Trochus, &c. N. 
Guisei is a well-marked horizon in the Clypeus-Grit. He observes 
that i( As far as we know at present, this is the mot-t southern 
locality in England where Nerincea has been found to occur in 
the Inferior Oolite, and abundantly too, since there are no less 
than three shell-beds traceable here."* Nerinwa occurs also at 
the Red Post Quarry further north. 
In the railway-cutting, west of Wellow Station, the Inferior 
Oolite has been exposed. The top beds resemble those near 
Charlcombe, Bath. They contain casts of Trigonia sculpta ? 
(large), and Natica ; also Nautilus, Terebratula, and Rhynchonella 
spinosa. Below come thick massive beds of compact brown 
oolitic limestone, with Lima pectiniformis, and Trichites. This 
succession is similar to that seen near Woolston Farm (see p. 83). 
The road-cuttings south of Wellow Church, and east of the 
railway-station, showed beds of the Inferior Oolite containing 
Rhynchonella spinosa, Avicula Munsteri, and Stomechinus. Below 
come the Midford Sands, with concretionary masses of calcareous 
sandstone, but they appear to be thin and were partially obscured 
by slips ; and at the base, there were blue micaceous sandy clays 
with hard cement-stones, and stiff blue more or less shaly clay, 
disturbed in places. I obtained no fossils in this clay, hence 
whether it be Upper Lias clay or not cannot be definitely 
affirmed. 
Further south the Sands, although well developed at Midford, 
have entirely died out, and the Inferior Oolite rests directly upon 
the Lias. Sections displaying this remarkably sudden attenuation 
were to be seen in the railway-cuttings : it is due no doubt to 
unconformable overlap of the Inferior Oolite, a fact indicated also 
by a pebbly band that is locally found at the base of the Oolite. 
The fossil-evidence shows that in this neighbourhood the Upper 
Division of the Inferior Oolite rests in some places directly on the 
Midford Sand and in other cases on the Lias. 
In the neighbourhood of Bath the Inferior Oolite is from 25 to 
45 feet in thickness, and, so far as observation has gone, the stone- 
beds belong mainly if not entirely to the upper part of the 
formation, or the zone of Ammonites Parkinsoni. The occurrence 
* Inf. Ool. Gasteropoda, p. 54. 
