291 
No. 3. The first five beds are of much the same character 
as the lower portion of 18 feet of the last section, and in No. 6 
there are layers of Pea-grit. The bottom of No. 7 is more of a 
shelly detritus, in the middle of it Gresslya abducta, Stomechinus, 
and Bryozoa are found, but the top of the bed is much disinte- 
grated and contains coarse Pea-grit. 
No. 8 is rather a remarkable bed of limestone, in places 
much broken up, and at the base it becomes a shelly roe stone. 
Terebratula Htheridgii, and sub Mazillata occur. On the last 
occasion when I visited the hill, I had the advantage of being 
accompanied by one of our Vice-Presidents, the Rev. Dr Smithe, 
who detected some dark specks in this bed, which he took home 
to examine, and he has kindly sent me the following description 
of it: “The fawn coloured band of marly Oolite was observed 
“to be full of a black granular substance, varying in size from a 
“mere speck to 4 millimetres or more across. Some of them 
“were collected and on examination proved to be magnetic iron 
‘oxide, also known as Black iron oxide (Fe, O,) being evidently 
“the natural product of the red sesquioxide (Fe,O,) when 
“exposed to the air and in aqueous vapour; this change often 
“occurs in aqueous rocks. The Oolitic iron stone of Cleveland 
“is similarly charged with this impure magnetic iron ore.” 
No. 9 is the celebrated Crickley Coral bed, the organic 
remains of which are fully described in the admirable supple- 
ment to this paper by my old friend Mr R. F. Tomes, and to 
which I call especial reference. 
It is capped by 10 feet of a much broken up bed, without 
Pea-grit, and the top is 750 feet high. 
No. 4. The section is taken at a short distance above the 
second water trough in descending the hill, on which there is a 
bench mark which is 629 feet above sea level, and about 80 yards 
below the upper water trough. At the base the Upper Lias 
sands may be seen, and No. 1 bed is micaceous with Belemnites, 
Gresslya abducta, Pentacrinites, Gasteropods, and Rhynchonella 
cynocephala. 
No. 2 is of a different nature, being very hard with Pectens 
and Belemnites difficult to extract ; and No. 3 changes again and 
