4 



BRITISH FOSSILS. 



" The stratigrapliical distribution of the four British Oolitic Pygasters is as follows : — 

 Pygaster semisulcatns, Inferior Oolite and Great Oolite ; 

 Pygaster conoideus. Inferior Oolite ; 



Pygaster Morrisii, Cornbrash ; 



Pygaster umbrella^ Coralline Oolite. 



" It was an error in the determination of the species, which led Professor Phillips to 

 state that Pygaster semisulcatns was found in the Coralline Oolite of Yorkshire, that 

 form never yet having been found in Yorkshire out of the Whitwell beds, — Inf. or Great 

 Oolite." 



3IaTch 1856. 



