178 Mr. Webster on the Strata lying over the Chalk, 



pits of a marie without flints, and which is evidently over the 

 chalk. The same marl is also to be found in Dorsetshire west of 

 Corfe Castle. I have not however heard of its existence in the 

 London basin. 



The agreement of the fossils of our chalk with that of France has 

 been already pointed out by Mr. Parkinson in his Memoir " on 

 some of the Strata in the neighbourhood of London," in the first 

 volume of the Transactions of this Society. In the following lists 

 I have been favoured by his assistance in the endeavour to appro- 

 priate the fossils to their peculiar beds. 



In the Chalk with Flints. 



Asterl^E resemblln": 



Pentagonaster semllunatus 



regularls 



Pentaceros lentlginosus 



Stella himbricalls, lacertosa, corpore sphcrico. 

 Echini of the following families ; 



CIdarls, 



Cassis, 



Spatangus, 



Fibula, 



Conulus, 

 Spines of the foregoing : particularly those resembling the belem- 



nltes as described by Mr. Parkinson. 

 Serpulse, particularly the serpula of Mr. Parkinson's organic 



remains, vol. 3. pi. 7. fig. 11. 

 Cardlum. 

 Spondylus. 

 Ostrea, several species. 



y several species. 



