266 Mr.DelaBeche otitheGeographicalDistributionqfOrgaii 



Of the 1 3 species of Echinites enumerated in the coralhne 

 oolite and calcareous grit of Yorkshire, 6 were first named by 

 Mr. Phillips ; of the remainder, 3 are found in Midland and 

 Southern England. The species of Echinites are not enume- 

 rated in the Continental lists. 



Of the very numerous fossil shells of the Yorkshire lists, the 

 greater proportion are new; 12 of the remainder are found in 

 the other localities; 12 in Midland and Southern England; 3 in 

 Normandy (one being questionable); and 3 in theN. of France. 



Of the 21 species contained in Mr. Conybeare's lists, or 

 noticed in the Weymouth beds, 12 are found in the other lo- 

 calities; and of these, 12 are found in Yorkshire, 3 in Nor- 

 mandy (1 being questionable*), and 3 in the North of France. 



Of the 7 species mentioned in Normandy, 3 are questionable; 

 of the remainder, 3 are found in Northei'n, Midland, and 

 Southern England, and 1 in the North of France. 



Of the 5 species determined with certainty in the coral rag 

 of the North of France, 3 are found in Northern, Midland, 

 and Southern England, and 1 in Normandy. 



Ostrea gregarea occurs in all the localities ; and Lima rudis, 

 Melania Heddingtonensis, and M. striata, are extensively dis- 

 tributed. It is probable, that when the Echinites and Poly- 

 pifers shall have been determined with care, many species will 

 be found widely dispersed. 



Upper Oolitic System. — Subdivision : Kimmeridge Clay. 



We unfortunately at present possess very little information 

 respecting the distribution of the organic remains of either this 

 subdivision or the following. Mr. Phillips gives the following 

 list of the Kimmeridge clay fossils in Yorkshire.f 



Ammonites plicomphalus? 

 Fragments of Ammonites. 



Dicotyledonous Wood. 

 Ostrea deltoidea. 

 Belemnites. 



Organic Remains in Midland and Southern England.X 



• Two other questionable species might be added. 



t Geology of Yorkshire, p. 1 25. 



X Conybeare, Outlines, &c. pp. 178, 179- 



Fossils 



