682 



Geological Society. 



Zones. 



DibunophyUum. 



Prodiictris 

 corrugato-hemisphericus 



and 



Splriferina luminosa. 



Sub-zones. 



Bands. 



rUpper(?) 



C Prodtictus latissimus 

 Middle •< and 



(_Lonsdalia Jloriformis. 



JlKlielinia megastoma. 



Lower i CyathoplujlUm 

 (. Murchtsoni. 



■r-r , C Ifematophyllum mi 

 P^ \ Cyrtina carbonaric 



Lower i Gastropod Beds. 



Botany Beds. 



I C Saccammina. 



(. Girvanella. 



CCt/rtina septosa. 

 < DaviesieUa 

 i. llangollensis. 



nus. ( Br3-ozoa Bed. 



Athyris glabristria. 



r Upper Datiesiella carinata. 



1 X ( Camarophoria 



(.I^o^^^'' i isorhyncha. 



Upper Setuinula ^regarla. 



Lower Solenvpora. 



ClisiophyUum 

 keyserlingi. 



,8plrifer 



ci.furcatus. 



' Thysanophyllum 

 psendo- 

 vermiculare. 

 Hhynchonella 

 tripUcata, 

 Producttis 

 globosus. 



f JEumetria proai-a 

 < Pleurodictyiim 

 (. cleistoporoidcs. 



Probable 



Bristol 



Equivalents, 



D3. 



D;. 



D,. 



C,. 



r- 



Basement Conglomerate. 



Spirifer - p i n s k e y e n s i s Bed 



The value of the different zonal indices selected is discussed and 

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

 Avhercas the zonal indices chosen for the larger groujis of beds are 

 often sporadically distributed in the zone, the bands form remarkably 

 reliable horizons, extending fre(]uently over large areas. 



The rocks are described under the following districts : — 



Shap and Ravenstonedale. 



Kendal and Kirkby Lonsdale. » 



Arnside and Carnforth. 



Grange and Furness District. 



The Westmorland Peunines aud Middleton-in-Teesdale. 



