226 F. Chapman — Microzoa in the BracMeaham Clay. 



YI. — On the Microscopic Contents of a Sample of Beacklesham 



Clay from Lbe-on-Solent, Hampshire. 



By Frederick Chapman, A.L.S., F.E.M.S. 



IN 1862, Professor T. Eupert Jones published some notes on 

 a careful microscopical examination of five samples of clay from 

 the Bracklesham beds of Bracklesham, Selsea, and the Isle of 

 Wight (?).^ This paper gave a good idea of the systematic methods 

 which could be employed in working over a sample of fossiliferous 

 material, especially when rich in microzoa, and the results of which 

 are often of great use to geologists and palgeontologists. 



Upon the lines there laid down, the following study of a sample 

 of clay from Lee-on-Solent has been made at the request of Professor 

 Eupert Jones ; and he has further kindly suggested that, since the 

 microzoa have had much attention directed towards them of late 

 years, these notes are worth publication, for further reference in 

 connection with beds of the same age from other localities. 



The bed from which the sample of clay was collected^ lies about 

 250 yards west of Lee Pier.^ It crops up out on the beach-level. 

 The cliff at this spot is capped with drift, composed of flint, chert, 

 and quartz. Beneath this is a bed of sand, and this is immediately 

 underlain by the fossiliferous Bracklesham bed ; but of this there is 

 very little exposure. 



Besults of the Examination of a piece of BracMesham Clay, 

 weighing 480 grains. 



A dark-green sandy (glauconitic) clay. 



Argillaceous. Arenaceous. Calcareous. 

 Total of 480 grains, separated 



as follows 280 grains 135 grains 65 grains 



Approximate percentage of 



constituents 58-3 28-1 13-54 



Mineral Constituents observed in the fine sandy residue after 



washing. — Quartz, Tourmaline, Zircon, Eutile, Glauconite. 

 Organic Eemains. 



Pisces. Lamna (?), fragment of tooth. 



Gasteropoda. Solarium canaliculatum., Lamarck, one specimen ; 

 Pleurotoma callifera, Edwards, one specimen. 



Lamellibranchiata. Crassatella Bartonensis, Edwards, one 

 specimen ; Corbula pisum, Sowerby, common. 



Bryozoa. Orbitulifera petiolus (Lonsdale), very common, 



Ostracoda. Bnirdia contracta, Jones, very rare ; Cythere striato- 

 punctata, Jones, very common ; G. scabropapulosa, Jones, frequent ; 

 Cytheridea perforata (Eomer), rare ; C. Miielleri (Miinster), veiy 



1 "On the Microscopical Examination of some Bracklesham Beds": The 

 Geologist, February, 1862, pp. 59-63. 



2 I am indebted to the Eev. E. Ashington Bullen, B.A., F.G.S., of Eeigate, for 

 the fossiliferous clay from Lee-on-Solent ; and he has also kindly furnished me with 

 the notes on the position of the beds in the locality, as given above. 



2 Lee-on- Solent, formerly Stubbington. 



