GREAT OOLITE : COR SHAM. 
FIG. 82. 
Quarry at Yatton Keynell, north-west of Chippenkam. 
(Prof. E. Hull.) 
269 
a. Forest Marble. Fissile shelly oolite, resting obliquely on the Great Oolite, 4 feet. 
I. Great Oolite (Upper Division). Eegularly bedded, massive, shelly, limestone, 
7 feet. 
c. Great Oolite (Lower Division). Shelly oolite full of false-bedding ; the upper part 
coarse, the lower affording fine building-stone, which has been followed 
underground : 16 feet. 
I obtained the following fossils from the Great Oolite Series of 
Corsham (C) and Yatton Keynell (Y) : 
, 
Lower Beds. 
Upper Beds. 
Cerithium .--_.. 
C Y 
Natica - - 
Y 
Onustus burtonensis 
Y 
Kimula clathrata - 
Y 
Trochus - , - 
Y 
Area - 
C 
Astarte interlineata - - 
Y 
Avicula costata ..... 
C 
Cardium Stricklandi - 
C Y 
Corbis Lajoyei - - 
Y 
Corbula ...... 
Y 
Cyprina - - - - - 
Y 
Lima cardiiformis . . - - 
C Y 
duplicata - 
C 
impressa . - 
c 
Lithodomus 
C Y 
Modiola ..... 
C 
Mytilus asper - - - - 
Y 
Ostrea gregaria - 
wiltonensis ? - - - 
Y 
Y 
C 
Pec ten hem ico status ----- 
C 
vagans - - - 
C Y 
Tancredia curtansata ? - 
C Y 
Trichites 
Y 
Trigonia pullus 
Y 
Rhynchonella concinna - - 
Y 
C Y 
obsoleta - .... 
Y 
Terebratula m ax i Hat a - - 
C Y 
Waldheimia cardium - 
C 
digona ------ 
C Y 
Diastopora - - - - 
C Y 
