682 



Geological Society. 



The value of the different zonal indices selected is discussed and 

 their distribution over the area is described. It is shown that, 

 whereas th^ zonal indices chosen for the larger groups of beds are 

 often sporadically distributed in the zone, the bands form remarkably 

 reliable horizons, extending frequently over large areas. 



The rocks are described under the following districts : — 



Shap and Ravenstonedale. 



Kendal and Kirkbj Lonsdale. 



Arnside and Oarn forth. 



Grrauge and Furness District. 



The Westmorland Pennines and Middleton-in-Teesdale. 



