550 ME. r. CHAPMAN ON THE PORAMINIFEEA [Aug. 1 898, 



We agree, therefore, with the opinions already expressed by 

 Dr. Gregory and Mr, Jukes-Browne as to the relative ages of the 

 Barbadian rocks, namely : — 



-D r Low-level Eeef s. 



Pleistocene and j tt- i, i ^ -d f 



p < High-level Keets. 



[ Globigerina-marls. 



Break. 



Miocene Oceanic Series. 



Break. 



Eocene or Oligocene ... Scotland Beds. — July, 1898.] 



An Appendix on the foraminifera which are present in the 

 Glohigerina-msLTl and limestone and in the basal reef-rocks has been 

 very kindly supplied by Mr. P. Chapman. Our thanks are due to 

 him and to Dr. J. W. Gregory for the interest taken and assistance 

 afforded during the progress of this work. We are also greatly 

 indebted to Mr. Jukes-Browne for the many suggestions given to 

 us, and for his help in preparing this paper for the press. 



YI. Appendix on the Foeaminifera from Bissex Hill and 

 BowMANSTON. By P. Chapman, Esq., A.L.S., P.R.M.S. 



Two years ago I received from Mr. G. P. Pranks a large number of 

 rock-specimens which he had collected from, the Globigerina-mai.rls 

 and overlying limestones on Bissex Hill, and at his request I under- 

 took to investigate them for foraminifera. 



The samples submitted were of small size, weighing from 1^ to 

 3 oz., and from these a fairly representative series was chosen, 

 consisting of eight rock-specimens. One of the samples examined 

 and reported on by the late Dr. H. B. Brady ^ (that labelled 

 ' Rotten Earth, Bissex Hill ') corresponds with the specimens which 

 are now described. 



The specimens that I have selected are friable ; they can be broken 

 down and washed without much difficulty ; and, generally speaking, 

 they yield about 50 per cent, of pure foraminifera, of which 

 Glohig evince form the greater part. Here and there the tests are 

 encrusted with calcareous matrix, or remain cemented together, 

 but many verj^ perfect and finely-developed specimens of the various 

 forms enumerated were selected from the washings. 



It will be seen from the subjoined list (p. 553) that all the species 

 recorded by Dr. Brady from Bissex Hill have again occurred in the 

 samples now described. 



Since the present study has resulted in the discovery of additional 

 species of foraminifera, we are now in a better position to form 

 some idea of the geological age of the Bissex Hill Olohigerina-msLrh. 



1 Quart. Journ. G-eol. Soc. vol. xlviii (1892) pp. 195-199. 



