316 OUR COMMON BRITISH FOSSILS. 



The Cotteswold district is a capital one for 

 "snake-stone" hunting. There we find beds full of 

 Ammonites Parkinsoni and A. Humphresianus. 



In the neighbourhood of Kimmeridge Bay where 

 lie the strata forming that division of the Oolite which 

 takes its name from the locality there are numerous 

 fossil Ammonites, all flattened, and usually of a 

 creamy-white colour. We often get fragments both 

 of the Kimmeridge and Oxford Clays in the Boulder 

 Clays of the Eastern Counties (where they have been 



Fig. 319. Ammonites falcatus. Fig. 320. Ammonites lautus. 



brought by ice-action), and they are sometimes so 

 full of these and other Secondary fossils that the 

 student may study the Dorsetshire, Oxfordshire, and 

 Lincolnshire Oolites (or their representatives) without 

 leaving his own parish. 



Of course, in the neighbourhood of Portland we 

 may see any number of huge, bulky Ammonites in 

 the rockeries of gardens. These large types are 

 found plentifully in the Portland stone, although only 

 as natural casts. 



