THE SNAILS AND SLUGS OF THE GREEN LANES ^23 



an abundant species of fossil helix (H. fdbyriidhiea) 

 met with in the Eocene strata of the Isle of Wight. 

 It is extinct in this country now, but it is still 

 living in the United States : a singular piece of 

 testimony, this, to the geological changes which 

 have rendered it extinct in its parent country, but 

 have driven it westerly before those events ensued 

 which now separate me Oid "Worlo from tho New ! 



