THE LOWER LIAS OE KEYN-SHAM. 
9 
chonella whicli is probably closely related to the ill-defined 
Rh. moorei. 
Carefully as we hunted in the banks of the steep road 
which leads directly from the quarry to the bottom of 
the hill, we found no trace of any hard bed contain- 
ing Middle Lias fossils. The only hard bed we were able 
to discover was a compact cream-coloured limestone which 
has a considerable resemblance in texture to a rock found in 
the Upper Lias of Sodbury, but, in the absence of fossils, its 
horizon must remain undetermined. A doubtfully persistent 
band of marlstone, about 1 ft. thick, immediately below the 
upper Lias bed, is recorded by Moore ^ at Upton Cheyney and 
Kelston Village, and one of us has found loose blocks con- 
taining belemnites, etc., in the same locality. Am. serpen- 
tinus is recorded by Moore from the Upper Lias of Upton 
Cheyney. 
The upper part of the sands can be examined in de- 
tail in exposures near Upton Cheyney on the north-west 
flank of Lansdown Hill. Here there occurs an actual Cepha- 
lopod bed in which ammonites of the Aalensis type are 
extremely common, whilst, at the very top of the sands 
immediately below the Inferior Oolite limestones, we have 
found specimens of Am. moorei. 
The Inferior Oolite itself consists, as at Midford, of only 
the upper portion, namely the Upper Trigonia grit. Fossils 
are very plentiful and specimens of Rh. spinosa, costate 
Trigonias and Lima pectiniformis^ are extremely common. 
Mr. Buckman’s. detailed section at North Stoke (a little 
further south on the west flank of the same hill) confirms the 
same general conclusions, namely that the sands are normally 
developed and capped by a distinct Cephalopod bed, but that 
1 Compare the general account in the Survey Memoir, pp. 212, 213. 
§ Q.J.G.S., vol. Iviii, p, V3G.. 
