518 
LOWER OOLITIC ROCKS OF ENGLAND : 
For figures of British Lower Oolitic Fossils, the student may consult 
Sowerby's " Mineral Conchology," the works of the Palaeontographical 
Society, Lycett's " Cotteswold Hills,'' Phillips' "Geology of Oxford and 
the valley of the Thames," Witchell's "Geology of Stroud," and Prestwich's 
"' Geology," vol. ii. 
REFKBENCES TO LOCALITIES. 
D. Dorsetshire. 
S. Somersetshire. 
W. Wiltshire. 
G. Gloucestershire. 
O. Oxfordshire. 
Bk. Buckinghamshire. 
Lond. London area (borings). 
Sy. Surrey (borings). 
Be. Bedfordshire. 
H. Huntingdonshire. 
N. Northamptonshire. 
E. Rutlandshire. 
L. Lincolnshire. 
Y. Yorkshire (the references are to 
the species noted from other 
countries, that occur also 
in Yorkshire). 
The grouping of the subdivisions is arranged, in ascending order, as follows : 
1. Zone of Ammonitiesjurensis. 
2. Zone of A. opalinus. 
3. Zone of A. Murchisona ; including Collyweston Slate and Lincolnshire 
Limestone. 
4. Zone of A. humphriesianus. 
-5. Zone of A. Parkinsoni. 
6. Fuller's Earth Clay and Rock, (Fullonian) ; including Upper Estuarine Series. 
7. Great Oolite and Stonesfield Slate ; including Great Oolite Limestone. 
8. Forest Marble and Bradford Clay ; including Great Oolite Clay. 
9. Zone of A. macrocephalus ; Cornbrash. 
x Occurs in the Lias, or in higher beds of the Oolitic Series, according to the 
column. 
