SPECIAL GEOLOGY. 



thoughts are carried back to a period when the tree grew 

 for years on dry land, enjoying a fit soil and climate." 



FIG. 260. 1. Cassidaria carinata. 2. Turritella edita. 3. Pleurotoma prisca. 

 4. Trochus agglutinans. 5. Area interrupta. 



FIG. 261. Wood perforated by Teredina personata, London clay. 



BASIN OF HAMPSHIEE AND THE ISLE OF WIGHT. We 

 described the strata of the London Basin as being wholly 

 marine ; but in the adjacent districts of Hampshire and 

 the Isle of Wight, we find alternations of fresh water and 

 marine beds, indicating those important changes in the level 

 of the land and sea to which we have already alluded. This 



