L. Richardson—Great- Oolite, Oxfordshire. 541 
(2) of bed 16; but both divisions (that is, ¢ and 4) are much thinner 
here. Below, again, is the greenish marl that occurs on top of the 
Lower Ostrea-Bed ; while at the base of all is seen the top portion of 
the yellower freestone-beds, which are seen to a greater depth in 
a small opening to the north, nearer the cottages. 
Previous Literature.—Professor E. Hull was the first to publish any 
remarks upon the Milton section. He wrote—! 
‘On Milton field, in a large quarry, a section similar to that at Windrush is 
exhibited. There we find about 17 feet of interstratified marls, shales, and thin- 
bedded limestones, highly fossiliferous, resting on thick- bedded oolite more than 
12 feet thick, and yielding large blocks, the one belonging to the upper zone, the 
other to the lower.” 
The ‘‘ thick-bedded oolite”’ is numbered 18 and 19 in my section. 
The late R. F. Tomes visited Milton with a view to seeing if there 
were any corals there.» He found one bed (number 4 of his record) 
sufficiently rich in them to cause him to name it the ‘ Coral-Bed’ ; 
but apparently he obtained nothing worth keeping or identifiable 
therefrom, because all the corals he lists came from a bed lower down 
—his bed 6. Mr. Paris and I found corals in beds 2, 46, and 6 of the 
record given above. Tomes also gives a record of the beds exposed 
at the time of this visit to show the positions of the coralliferous 
limestones; but whilst it is obvious that his beds 17 and 19, or at 
least the portions of them that contain oysters in abundance, correspond 
to my beds 15 and 17 respectively, it is not so easy to say more than 
that his bed 6, that is, ‘‘stone in large blocks,” appears to be my 
bed 6c. 
Mr. H. B. Woodward, the next author to notice this section, also 
appears to have encountered some difficulty in making out Tomes’s 
section, for he came to the conclusion that the topmost five beds of 
Tomes’s record ‘‘ were not clearly exhibited at the time he visited the 
quarry”. He therefore repeated Tomes’s observations so far as those 
beds were concerned. After that he found it necessary to make his 
own section, which differs materially from Tomes’s. 
When Mr. Paris and I visited Milton there were no quarrymen 
about so we were unable to check our identification of the ‘small 
land-stones’ with bed 6a of the present record; of the ‘Blue Rag’ 
with bed 124; and of the ‘ Bastard White Rags’ with bed 14. But 
I think the identifications are correct, and this being so there is 
a noticeable correspondence between my record and Mr. Woodward’s 
down to bed 15d, which is his ‘‘ brown clay with Ostrea sowerbyi and 
Rhynchonella concinna (abundant)’’. But then there is a difference. 
Bed 15d is my Upper Ostrea-Bed, and it occurs at 7 ft. 4 in. above 
the Lower Ostrea-Bed. Above the Upper Ostrea-Bed is a conspicuous 
blue shaly clay (15d). Mr. Woodward notes above his ‘‘ brown 
clay with Ostrea sowerbyi, etc.”, ‘blue clay.’ So I think that 
Mr. Woodward’s Oyster-Bed is really the Upper Ostrea-Bed, and that 
in going from one working to the other to complete the downward 
succession he may have overlooked the fact—as could easily be done— 
1 Mem. Geol. Sury.: ‘‘ The Geology of the Country around Cheltenham,” 1857, 
p. 58. 
2 Quart. Journ. Geol. Soc., vol. xli, p. 171, 1885. 
