504 



THE WONDERS OF GEOLOGY. 



Lect. V. 



In Wiltshire the Cornbrash is succeeded by the strata 

 termed Forest Marble, Bradford Clay, Great Oolite, and, 

 lastly, by the lower beds of the system.* 



Lign. 113. — Shells from the Yorkshire Cornbrash. 



Fig. 1. Sanguinolaria parvula. 



2. Bulla undulata. 



3. Littorina punctura. 



4. Anomia semistriata. 



5. Cardium globosum. 



6. Isocardia triangularis. 



* The admirable memoir by Mr. Lonsdale, on the Geology of the 

 country around Bath, should be consulted by those desirous of more 

 ample information on the oolite of that part of England ; Gcol. Trans, 

 vol. iii. p. 242 ; — and Professor Phillips's Geology of Yorkshire, for a 

 full account of the oolitic system of the eastern moorlands of that 

 county. My son informs me that wherever the railway excavations 

 have traversed the district described by Mr. Lonsdale, lie has found 

 that gentleman's sections and descriptions of the strata accurate even 

 in the minutest details. 



