542 Transactions of the Society. 



16. Interior of Cardita, Bracklesham. A green sandy clay in 

 which we have found no trace of any Foraniinifera whatever. 



It will therefore be seen that within the time limits of our 

 researches up to the present, the genus Cycloloculina is found as a 

 derived fossil only, in the shore-sands of the western side of Selsey 

 Bill, from the extreme point opposite the Marine Hotel, up to 

 Medmerry Farm, growing more scarce as one proceeds north- 

 westward. The shell is extremely delicate and friable, and we are 

 of opinion that it is incapable of travelling far in a perfect 

 condition, or of withstanding the wash of the tide for more than a 

 short while. It is found by us in its best state in elutriated rough 

 material, the process of washing appearing to damage it almost 

 beyond recognition, whilst its weight renders it almost entirely 

 absent from " floatings." It would appear therefore to be washed 

 from some Post-Tertiary mud stratum near that which Mr. 

 C. Reid has named the " Selsey Beds," where it occurs no doubt 

 to-day as a derived fossil, having been washed there from some 

 hitherto undiscovered soft band in the Eocene clays of the Pholas- 

 bed which fringes the shore at this point. It appears furthermore 

 to be one of Nature's failures, existing probably in great quantity 

 in situ wherever it came into existence, but the exact geological 

 stratum or deposit in which it had its origin is for the present 

 purely conjectural, and must remain so until we can make a mure 

 extended and localised series of dredgings. 



Note. — In the completing paper which we propose to lay before 

 the Society shortly, we shall endeavour to trace the relationships 

 between the sub-marine and the sub-aerial geology of the peninsula 

 of Selsey, and, in giving a list of the Foraniinifera both recent and 

 fossil which we have identified in our gatherings, we shall make 

 the attempt to ascribe to each species its correct, or at any rate 

 probable, origin. 



Postscript. 



In the preparation of this paper it has been found necessary to 

 consult many authorities, and we think it desirable to give the 

 following list of works, in chronological order, to which we have 

 had recourse for the purpose of verifying our researches into the 

 origin of the Foraniinifera of the Selsey peninsula. 



1. Trimmer, J. — On the Agricultural Geology of England and Wales. 



Jonrn. Eoy. Agric. Soc. England, xii. (1851) p. 445. 



2. God win-Austen, K. — On the Newer Tertiary Deposits of the Sussex Coast. 



Quart. Journ. Geol. Soc., xiii. (1855) p. 40. (1857 Postponed Papers.) 



3. Fisher, 0. — On the Bracklesham Beds of the Isle of Wight Basin. 



' Op. cit., xviii. (1S61) p. 65. 



