98 



J. E. Marr — The Coniston Limestone Series. 



faunas, that of tbe lowest group (Eoman Fell), and of the highest 

 (Ashgill), being quite different from that of the Sleddale group, 

 ■which latter has yielded the greater number of fossils recorded in 

 the Coniston Limestone lists hitherto published, though a few 

 species belonging to the other two groups have been incorporated 

 into these lists. 



Outline-Map of the English Lake- District. 



EXPLANATION OF MAP. 



Scale I 



I 



10 



Miles. 



20 



Dr = Drygill. 

 Ir = Ireleth. 

 M = Millom 

 A = Ashgill. 

 Sk = Skelgill. 



SE = Stile End. 

 S = Shap. 

 Du = Diifton. 

 Sb = Sedbergh. 

 St = Settle. 



§ 2. Detailed Description of the Sections. — The fossils of the 

 lowest (Eoman Fell Group) have hitherto been detected only in 

 the area of the Cross Fell Inlier, and the beds containing them 

 have been recently described by Prof. Nicholson and myself in 

 the paper referred to above. The thickness of the beds varies, 

 and is difficult to measure owing to the disturbances which the rocks 

 have undergone; but the greatest thickness probably does not exceed 

 two hundred feet. The beds consist of ashes, ashy shales, and 

 nodular black limestones, the latter often composed almost exclusively 

 of the tests of Beijrichia. The table of fossils appended to this paper 

 contains a list of the known forms from the beds of this group. 



