106 
ADDITIONAL OBSERVATIONS ON THE 
On treating a piece with acid the sand grains remained 
coherent. 
The limestone in bed F (iii.) occurs in lenticular masses^ 
having a greater axis of about 1 foot 6 inches. Between the 
masses occurs a siliceous clay. In the limestone Avicula 
contorta was found. 
Though there are no signs here of erosion or shore deposit 
at the base of the JSTaiadites beds, Mr. Wickes has found a 
shore deposit in bed (i.), indicating that, owing to silting up, 
combined perhaps with slight elevation, shallow water con- 
ditions prevailed after the deposition of the Black Shales, 
those possibly forming muddy flats on which Naiadites 
could flourish. Mr. Rendle Short, B.Sc, has noted ripple 
marks in the Naidites beds, and they also occur in the bands 
in the overlying clay, though this is not conclusive proof of 
very shallow water conditions. 
The second section was exposed beneath the roadway im- 
mediately on the east side of the Bishop's Palace at Redland 
Green in laying a sewer. The measurements were made 
with a plumb line under disadvantageous conditions, and 
may not be accurate to an inch or so. 
{G.H.I.?) Hard, dark limestone, crowded with crushed 
shells {Pecten valoniensis, etc.), and 
abundant fish remains . . . . 2 10 
F. Black pyritous shales (base not seen) . 5 0 
The thick, dark limestone contains numerous cream-coloured 
argillaceous nodules, with no fossils ; the smaller nodules are 
pressed out in the bedding-planes, while the shelly laminae 
curve round the larger. 
The thickening of the beds, especially of the limestone, 
iV. Gotham stone 
L. Clay 
K. Naiadites beds 
ft. in. 
0 4 
2 6 
2 7 
