298 



J. F. BLA.KE AND W. H. HUDLESTON ON 



by him as absent, an interpretation which, though in our opinion 

 erroneous, proves that he saw the difference between these beds and 

 the Lower Calcareous Grit. 



Yig. 5. — Section of Hiyhworth South Quarry, 



Coral Kag. 



Coralline Oolite. 



Lower Calcareous Grit. < 



The bed No. 7 lithologically agrees better with the beds below than 

 with those above, though closely amalgamated with No. 6 ; and we 

 would include it with the Lower Calcareous Grit, from which No. 6 

 forms a kind of passage to the beds above. The drifted Coral-bed, 

 No. 5, is a feature which we have not yet met with on this horizon, 

 but which may be paralleled in Yorkshire. It is not, however, a 

 reef, but derived from one in the neighbourhood, the locality of 

 which, if still existing, has not yet been discovered. It contains also 

 Ammonit.'s plicatilis, Littorina murtcata, Opis Phillipsi, Unicardium 

 plenum, and fragments of Trichites bored by Lithodomus. The 

 Littorina seems to be the constant companion of coral,whenever formed 

 about this epoch. The Ammonite, however, clearly distinguishes 

 this bed from the Lower Calcareous Grit, in which that species is 



