Rhcetic Fossils. 



1 6 



of the neighbourhood of land that bordered the old 

 Triassic lake, and the succeeding shallow Khsetic sea, 

 part of which was the Mendip Hills, ' the home of the 

 Microlestes.' ! 



In the beds of passage, from 10 to 50 feet above 



FIG. 34. 



Pecten Yaloniensis. 



Ceratodus parvus. 



Avicula contorta. 



Discina Townskendi. 



Nomacanthus 

 filifer. 



Myophoria postera. 

 Group of Ehaetic Fossils. 



the Bone bed, there are certain thin bands in 

 Gloucestershire, named by the Eev. P. B. Brodie, who 



1 For notices of this old land, see De la Beche ' On the Formation 

 of the Kocks of South Wales and South- West of England ' ; and 

 Ramsay, ' Denudation of South Wales and the Adjacent Counties of 

 England,' Mem. Geol. Surv. vol. i. 1846; and 'Abnormal Conditions 

 of Secondary Deposits,' &c., by Charles Moore, ' Quarterly Journal 

 Geol. Soc.' vol. xxiii., 1867. 



M 2 



